Prescription onlyLower-cost generic availableClass: Infection

Keflex Alternatives

(Cephalexin)

Prescription onlyLower-cost generic availableClass: Infection
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Compare Keflex (Cephalexin) to alternatives

These medications are comparable to Keflex (Cephalexin) or used for similar purposes.

Keflex
(Cephalexin)

Bactrim
(Sulfamethoxazole / Trimethoprim)

Cipro
(Ciprofloxacin)

Levaquin
(Levofloxacin)

Cleocin T
(Clindamycin Phosphate)

Vibramycin
(Doxycycline)

Augmentin
(Amoxicillin / Clavulanate)

Zithromax
(Azithromycin)

Penicillin Vk
(Penicillin)

Amoxil
(Amoxicillin)

Kills bacteria. Keflex (Cephalexin) is good for treating many bacterial infections and is available as generic. However, if you are on medications to thin your blood, you can be more likely to bleed.Kills bacteria. Bactrim (Sulfamethoxazole / Trimethoprim) is good for treating many bacterial infections and is available as a generic. However, you can be more likely to sunburn. Also, it can cause birth defects, so talk to your doctor if you're pregnant.Kills bacteria. Cipro (Ciprofloxacin) is a good and cheap antibiotic to treat many types of bacterial infections. However, you have to reduce your caffeine intake, and have to protect yourself from the sun.Kills bacteria. Levaquin (Levofloxacin) is good for treating many bacterial infections and is available as generic. However, it can cause damage to your tendons, and make your skin more sensitive to the sun.Topical treatment for acne. Cleocin T (Clindamycin Phosphate) is good for treating many bacterial infections and is available as a generic. If you're taking the vaginal form, you have to avoid sex and tampons for the period your doctor tells you to. The topical form can cause skin sensitivity and irritation.Treats bacterial infections. Vibramycin (Doxycycline) is good for treating many bacterial infections. It is also available as generic. However, it can make birth control pills less effective. You also have to protect yourself against sunburn.Kills bacteria. Augmentin (Amoxicillin / Clavulanate) is good for treating many bacterial infections and is available as generic. However, it will make birth control pills less effective. It also has to be taken with food since it can cause an upset stomach.Kills bacteria. Zithromax (Azithromycin) is good for treating many bacterial infections. It is also available as generic. Talk to your doctor if you've ever had liver disease, myasthenia gravis, or on medications to thin the blood, as the doctor may write an alternative.Kills bacteria. Penicillin Vk (Penicillin) is good for treating many bacterial infections and is available as a generic. You may need to use another form of birth control along with your birth control pills. It's also best taken on an empty stomach but it can cause an upset stomach.Treats bacterial infections. Amoxil (Amoxicillin) is a good and cheap antibiotic to treat many types of bacterial infections. However, many bacteria are resistant to this medication.
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Reviews & ratings
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5.08Keflex
Reviews for Keflex (Cephalexin)
64%
of people (All ages) say Keflex (Cephalexin) is worth it
48%
say it works well
14%
say it's a big hassle
686 reviews
Have you used Keflex (Cephalexin)?
Worth itNot sureNot worth it
Reviews for Bactrim (Sulfamethoxazole / Trimethoprim)
59%
-5% worse vs. Keflex (Cephalexin)
49%
+1% better vs. Keflex (Cephalexin)
22%
-8% worse vs. Keflex (Cephalexin)
473 reviews
Have you used Bactrim (Sulfamethoxazole / Trimethoprim)?
Worth itNot sureNot worth it
Reviews for Cipro (Ciprofloxacin)
63%
-1% worse vs. Keflex (Cephalexin)
53%
+5% better vs. Keflex (Cephalexin)
17%
-3% worse vs. Keflex (Cephalexin)
755 reviews
Have you used Cipro (Ciprofloxacin)?
Worth itNot sureNot worth it
Reviews for Levaquin (Levofloxacin)
53%
-11% worse vs. Keflex (Cephalexin)
40%
-8% worse vs. Keflex (Cephalexin)
31%
-17% worse vs. Keflex (Cephalexin)
Have you used Levaquin (Levofloxacin)?
Worth itNot sureNot worth it
Reviews for Cleocin T (Clindamycin Phosphate)
57%
-7% worse vs. Keflex (Cephalexin)
43%
-5% worse vs. Keflex (Cephalexin)
19%
-5% worse vs. Keflex (Cephalexin)
115 reviews
Have you used Cleocin T (Clindamycin Phosphate)?
Worth itNot sureNot worth it
Reviews for Vibramycin (Doxycycline)
49%
-15% worse vs. Keflex (Cephalexin)
36%
-12% worse vs. Keflex (Cephalexin)
24%
-10% worse vs. Keflex (Cephalexin)
112 reviews
Have you used Vibramycin (Doxycycline)?
Worth itNot sureNot worth it
Reviews for Augmentin (Amoxicillin / Clavulanate)
68%
+4% better vs. Keflex (Cephalexin)
52%
+4% better vs. Keflex (Cephalexin)
13%
+1% better vs. Keflex (Cephalexin)
1034 reviews
Have you used Augmentin (Amoxicillin / Clavulanate)?
Worth itNot sureNot worth it
Reviews for Zithromax (Azithromycin)
74%
+10% better vs. Keflex (Cephalexin)
59%
+11% better vs. Keflex (Cephalexin)
11%
+3% better vs. Keflex (Cephalexin)
909 reviews
Have you used Zithromax (Azithromycin)?
Worth itNot sureNot worth it
Reviews for Penicillin Vk (Penicillin)
71%
+7% better vs. Keflex (Cephalexin)
52%
+4% better vs. Keflex (Cephalexin)
12%
+2% better vs. Keflex (Cephalexin)
1297 reviews
Have you used Penicillin Vk (Penicillin)?
Worth itNot sureNot worth it
Reviews for Amoxil (Amoxicillin)
62%
-2% worse vs. Keflex (Cephalexin)
45%
-3% worse vs. Keflex (Cephalexin)
14%
Same vs. Keflex (Cephalexin)
786 reviews
Have you used Amoxil (Amoxicillin)?
Worth itNot sureNot worth it
Side effects
KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin

The Keflex FDA package insert doesn’t have numbers about how common side effects are.

More about Keflex side effects »

The Bactrim FDA package insert doesn’t have numbers about how common side effects are.

More about Bactrim side effects »
  • Any musculosketal side effect 14%
  • Any side effect 41%
  • Any musculoskeletal side effect 9%
  • Any neurological side effect 3%
  • Nausea 3%
  • Diarrhea 2%
  • Any gastrointestinal side effect 15%
  • Any serious side effect 8%
  • Vomiting 5%
  • Abdominal pain 3%
More Cipro side effects »
  • Nausea 7%
  • Headache 6%
  • Diarrhea 5%
  • Sleep difficulty 4%
  • Dizziness 3%
  • Consitpation 3%
  • Abdominal pain 2%
  • Vomiting 2%
  • Indigestion 2%
  • Rash 2%
More Levaquin side effects »
  • Any side effect 21%
  • Vaginal moniliasis 8%
  • Vulvovaginitis 6%
  • Vulvovaginal disorder 3%
  • Moniliasis (body) 2%
  • Fungal infection 2%
More Cleocin side effects »
  • Any adverse event 40%
  • Nausea 13%
  • Vomiting 8%
  • Diarrhea 3%
  • Bacterial vaginitis 3%
  • Headache 2%
  • Upper abdominal pain 2%
  • Vaginal yeast infection 2%
More Doxycycline side effects »
  • Diarrhea 9%
  • Nausea 3%
  • Skin rashes and urticaria 3%
More Augmentin side effects »
  • Diarrhea 5%
  • Nausea 3%
  • Abdominal pain 3%
  • Vomiting 6%
  • Rash 2%
  • Vaginitis 2%
More Azithromycin side effects »

The Penicillin FDA package insert doesn’t have numbers about how common side effects are.

More about Penicillin side effects »
  • Any side effect 11%
  • Vulvovaginal mycotic infection 2%
  • Diarrhea 2%
More Amoxicillin side effects »
How it works
KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
Keflex (Cephalexin) is an antibiotic. It kills bacteria by preventing them from making their own protective covering.Bactrim (Sulfamethoxazole / Trimethoprim) is a combination antibiotic that contains sulfamethoxazole and trimethoprim. It kills bacteria by preventing them from making proteins and other chemicals that keep them alive.Cipro (Ciprofloxacin) is an antibiotic. It kills bacteria by preventing them from reproducing and repairing themselves.Levaquin (Levofloxacin) is an antibiotic. It kills bacteria by preventing them from reproducing and repairing themselves.Cleocin T (Clindamycin Phosphate) is an antibiotic and acne medicine. It kills bacteria by preventing them from reproducing and repairing themselves.Vibramycin (Doxycycline) is a tetracycline antibiotic. It stops bacteria by preventing them from reproducing and repairing themselves.Augmentin (Amoxicillin / Clavulanate) is a combination antibiotic. Amoxicillin kills bacteria and prevents them from reproducing and making their own protective covering. Clavulanate stops chemicals the bacteria make to resist antibiotics.Zithromax (Azithromycin) is an antibiotic. It kills bacteria by preventing them from reproducing and repairing themselves.Penicillin Vk (Penicillin) is an antibiotic. It kills bacteria by preventing them from making their own protective covering.Amoxil (Amoxicillin) is an antibiotic. It kills bacteria and prevents them from reproducing and making their own protective covering.
Type of medication
KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
Prescription only
Prescription only
Prescription only
Prescription only
Prescription only
Prescription only
Prescription only
Prescription only
Prescription only
Prescription only
Available as
KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
  • Pill
  • Powder for oral suspension
  • Pill
  • Liquid
  • Pill
  • Extended release
  • Infusion (iv)
  • Pill
  • Liquid
  • Topical
  • Cream, gel, or ointment
  • Foam
  • Vaginal cream
  • Vaginal suppository
  • Injection
  • Pill
  • Delayed release capsule
  • Liquid
  • Pill
  • Chewable tablet
  • Extended release
  • Liquid
  • Pill
  • Liquid
  • Eye drops
  • Pill
  • Pill
  • Chewable tablet
  • Liquid
Used for
KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
Risk factors for serious side effects
KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
    Detailed Keflex (Cephalexin) risks & warnings »
            Detailed Bactrim (Sulfamethoxazole / Trimethoprim) risks & warnings »
            • Over 60 years of age
            • On long-term steroid use
            • Heart, kidney, or lung transplant
            • Myasthenia gravis
                  Detailed Cipro (Ciprofloxacin) risks & warnings »
                  • Over 60 years of age
                  • On long-term steroid use
                  • Heart, kidney, or lung transplant
                    • History of liver disease
                    • Seizures
                        • Diabetes
                        • Taking medications for diabetes
                            Detailed Levaquin (Levofloxacin) risks & warnings »
                              • History of liver disease
                                Detailed Cleocin T (Clindamycin Phosphate) risks & warnings »
                                • Age 8 years or younger
                                • Using oral birth control pills
                                • Long antibiotic treatment period
                                    • Women of childbearing age
                                    • Women of childbearing age
                                    • Overweight or obese
                                    • Taking isotretinoin (Accutane)
                                    Detailed Vibramycin (Doxycycline) risks & warnings »
                                    • Mononucleosis
                                      • History of liver disease
                                        Detailed Augmentin (Amoxicillin / Clavulanate) risks & warnings »
                                            • History of liver disease
                                            • History of myasthenia gravis
                                            Detailed Zithromax (Azithromycin) risks & warnings »
                                                • Prior severe allergic reaction to Penicillin Vk (Penicillin)
                                                Detailed Penicillin Vk (Penicillin) risks & warnings »
                                                • Long antibiotic treatment period
                                                • History of penicillin allergies
                                                • Using oral birth control pills
                                                  Detailed Amoxil (Amoxicillin) risks & warnings »
                                                  Pregnancy

                                                  Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

                                                  Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

                                                  Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

                                                  Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

                                                  Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

                                                  Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

                                                  Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

                                                  Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

                                                  The FDA hasn’t classified this medicine’s effects on unborn babies. Talk with your doctor about this medicine if you’re pregnant or planning on it.

                                                  Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

                                                  Food
                                                  KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
                                                  • Can be taken with or without food.
                                                  • If you're on blood thinners (anticoagulants), talk to your doctor, it may make you more likely to bleed.
                                                  No food related info.No food related info.No food related info.
                                                  • Can be taken with or without food.
                                                  No food related info.
                                                  • Should be taken with food since it can cause stomach upset.
                                                  • Take each dose with a meal since it may cause an upset stomach.
                                                  • Can be taken with or without food.
                                                  • Can take with or without food.
                                                  No food related info.
                                                  • Take with food to decrease upsetting your stomach (nausea, vomiting).
                                                  Kidneys and liver
                                                  KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
                                                  No kidneys and liver related info.No kidneys and liver related info.No kidneys and liver related info.
                                                  • There have been reports of liver damage that can require hospitalization or can cause death. These have been rare. Talk to your doctor if you notice pain in your abdomen, loss of appetite, yellowing of your skin or eyes, or dark colored urine.
                                                  • There have been reports of liver damage that can require hospitalization or can cause death. These have been rare. Talk to your doctor if you notice pain in your abdomen, loss of appetite, yellowing of your skin or eyes, or dark colored urine.
                                                  No kidneys and liver related info.
                                                  • There have been reports of liver damage that can require hospitalization or can cause death. These have been rare. Talk to your doctor if you notice pain in your abdomen, loss of appetite, yellowing of your skin or eyes, or dark colored urine.
                                                  • There have been reports of liver damage that can require hospitalization or can cause death. These have been rare. Talk to your doctor if you notice pain in your abdomen, loss of appetite, yellowing of your skin or eyes, or dark colored urine.
                                                  No kidneys and liver related info.No kidneys and liver related info.
                                                  Pain
                                                  KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
                                                  No pain related info.No pain related info.
                                                  • If you notice pain in your Achilles tendons, contact your doctor.
                                                  • If you notice redness/inflammation, pain or swelling in your joints or muscles, especially in the Achilles tendon, contact your doctor immediately.
                                                  • Talk to your doctor immediately if you start to feel burning, tingling, numbness, pain or you can't tolerate heat or cold. This could be a sign of nerve damage and it can happen as soon as you start taking the medication and may not go away if you stop it.
                                                  • If you notice pain in your Achilles tendons, contact your doctor.
                                                  • If you notice redness/inflammation, pain or swelling in your joints or muscles, especially in the Achilles tendon, contact your doctor immediately.
                                                  • Talk to your doctor immediately if you start to feel burning, tingling, numbness, pain or you can't tolerate heat or cold. This could be a sign of nerve damage. It can happen as soon as you start taking the medication and may not go away if you stop it.
                                                  • The forms taken by mouth can cause diarrhea, vomiting, and abdominal pain.
                                                  No pain related info.No pain related info.
                                                  • Can cause abdominal pain, diarrhea, vomiting, and nausea.
                                                  No pain related info.No pain related info.
                                                  Upsides and benefits
                                                  KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Can be taken with or without food.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen to this antibiotic. Your doctor may run tests to see if Bactrim responds to your infection.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Available in generic.
                                                  • Topical form treats acne.
                                                  • Available in different oral forms: tablet, capsule, and suspension.
                                                  • Available in forms to treat skin infections and vaginal infections.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Can be taken with or without food.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Less resistance seen in bacteria to this antibiotic. Your doctor may run tests to see which antibiotics will kill the bacteria causing your infection.
                                                  • Can be taken with or without food.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  • Available in generic.
                                                  • Available in different forms: tablet, capsule, and suspension.
                                                  • Used to treat many types of bacterial infections.
                                                  Downsides and risks
                                                  KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
                                                  • If you're on blood thinners (anticoagulants), talk to your doctor, it may make you more likely to bleed.
                                                  • If you have to take any live vaccines, talk to your doctor. You may have to postpone it.
                                                  • Can cause diarrhea.
                                                  • Makes your skin more sensitive to the sun.
                                                  • Has to be taken with plenty of liquids.
                                                  • May cause birth defects.
                                                  • Can cause diarrhea.
                                                  • Must be used with caution in people over 60 years of age, or who have had either an organ transplant or on long-term steroid use due to possible tendon rupture.
                                                  • If you have caffeine while on Ciprofloxacin, you may noticed increased effects of the caffeine.
                                                  • Ciprofloxacin can make your skin more sensitive to the sun.
                                                  • Can't be used if you've ever had myasthenia gravis.
                                                  • Can cause diarrhea.
                                                  • Must be used with caution in people over 60 years of age, or who have had either an organ transplant or on long-term steroid use due to possible tendon rupture.
                                                  • Levofloxacin can make your skin more sensitive to the sun.
                                                  • Can't be used if you've ever had myasthenia gravis.
                                                  • You have to space out any medications with aluminum, magnesium or zinc by at least 2 hours.
                                                  • Can cause changes in taste, headaches, and insomnia.
                                                  • Have to take the oral forms with a full glass of liquid or with food since it can cause irritation in your stomach and esophagus.
                                                  • If you're taking the vaginal form, you have to avoid sex and not use tampons for the period your doctor tells you to.
                                                  • If you're allergic to aspirin, your doctor may have to prescribe an alternate.
                                                  • If you have to take live vaccines, talk to your doctor when to take them since Clindamycin can make it less effective.
                                                  • If you're taking the topical form, it can cause sensitivity and irritation.
                                                  • Can't be used in pregnant women and children under 8 years old.
                                                  • Makes your skin more sensitive to the sun.
                                                  • Has to be taken with plenty of water and food and you have to stay upright for 30 minutes afterwards to avoid stomach irritation.
                                                  • Can make birth control less effective.
                                                  • Can cause diarrhea.
                                                  • If you're on birth control pills, you should use a barrier method (condoms, diaphragms) since Augmentin can make them less effective.
                                                  • Should be taken with food since it can cause stomach upset.
                                                  • If you have phenylketonuria (PKU), talk to your doctor to prescribe an alternative.
                                                  • Must space out antacids by at least 2 hours.
                                                  • Has to be used with caution in people who've had liver disease.
                                                  • Can't be used in people who've had myasthenia gravis.
                                                  • Must be used with caution in people who are on medications to thin the blood (anticoagulants) because of increased risk of bleeding.
                                                  • Can cause abdominal pain, diarrhea, vomiting, and nausea.
                                                  • Many bacteria have developed resistance. Your doctor may run tests to see if Penicillin will work on your infection.
                                                  • Can make birth control pills less effective.
                                                  • Best taken on an empty stomach, but can cause stomach upset and diarrhea.
                                                  • Suspension must be stored in the fridge.
                                                  • Can make birth control pills and live vaccines less effective.
                                                  • Many bacteria have developed resistance to this antibiotic.
                                                  • Can cause diarrhea.
                                                  Tips from our pharmacists for people taking the medication
                                                  KeflexBactrimCiproLevaquinCleocinDoxycyclineAugmentinAzithromycinPenicillinAmoxicillin
                                                  • Take this medication exactly as your doctor tells you to.
                                                  • Store the suspension in the refrigerator. All other forms can be kept at room temperature.
                                                  • Space out vitamins by a couple hours if you're taking this medication.
                                                  • Take this medication exactly how your doctor tells you to.
                                                  • Can make your skin more sensitive to the sun.
                                                  • Drink plenty of liquids when taking the medication.
                                                  • Can cause diarrhea, nausea or vomiting.
                                                  • Can cause rash.
                                                  • If you notice pain in your Achilles tendons, contact your doctor.
                                                  • Wear sunscreen if you're going to be out in the sun.
                                                  • Take the medication exactly how the doctor tells you to.
                                                  • Avoid taking this by itself with dairy products (milk, cheese, yogurt) or with juice with calcium.
                                                  • Take this medication at least 2 hours before or 6 hours after any antacids with magnesium or aluminum or with any vitamins with calcium, iron or zinc.
                                                  • Can cause diarrhea, nausea or vomiting.
                                                  • Limit your caffeine intake while taking this medication.
                                                  • If you notice pain in your Achilles tendons, contact your doctor.
                                                  • Wear sunscreen if you're going to be out in the sun.
                                                  • Take the medication exactly how the doctor tells you to.
                                                  • Take this medication with plenty of fluids.
                                                  • Space out any medications containing aluminum, magnesium or zinc by at least 2 hours.
                                                  • Can cause diarrhea, nausea or vomiting.
                                                  • Can cause changes in taste, headaches and insomnia.
                                                  • The forms taken by mouth can cause diarrhea, vomiting, and abdominal pain.
                                                  • Take this medication exactly how your doctor tells you to.
                                                  • Store the suspension at room temperature.
                                                  • If you're using the topical form, it can take a few weeks to see the full effect.
                                                  • Keep the topical form out of your eyes, nose and mouth.
                                                  • If you're using the topical form, Don't put makeup or bandages over it.
                                                  • If you're using the vaginal form, don't have sex before the doctor tells you it's ok.
                                                  • Take the medication exactly how your doctor tells you to.
                                                  • If you're using birth control pills, this medication can make them less effective.
                                                  • Wear sunblock if you have to go out into the sun since your skin can become more sensitive to sunburn.
                                                  • Can cause diarrhea, nausea or vomiting.
                                                  • Space out any vitamins by at least two hours.
                                                  • Take with plenty of food and liquids.
                                                  • Don't take any medications with bismuth (Pepto-Bismol, Kaopectate) while taking this medication.
                                                  • Don't lie down for at least 30 minutes after taking this medication.
                                                  • Take this medication exactly as your doctor tells you to.
                                                  • Take each dose with a meal since it may cause an upset stomach.
                                                  • If you are taking birth control pills, this can make it less effective.
                                                  • Store the suspension in the refrigerator. All other forms can be kept at room temperature.
                                                  • Take the medication exactly how your doctor tells you to.
                                                  • Can cause diarrhea, nausea or vomiting.
                                                  • Space out any antacids with magnesium or aluminum by at least 2 hours.
                                                  • Can take with or without food.
                                                  • Take this medication exactly how your doctor tells you to.
                                                  • If you're taking birth control pills, this medication can make them less effective.
                                                  • Try to take it on an empty stomach. If this gives you an upset stomach, take it with food.
                                                  • Can cause diarrhea, nausea or vomiting.
                                                  • Finish all of the medicine your doctor gives you, even if you start to feel better. Stopping it early can cause the bacteria to develop resistance, making the medicine ineffective.
                                                  • If you're taking birth control pills, this medication may make them less effective.
                                                  • Take with food to decrease upsetting your stomach (nausea, vomiting).
                                                  • If you're giving the suspension, you can mix it with a cold drink, but make sure to take it right away.
                                                  • Keep the suspension form in the fridge. All other forms should be kept at room temperature.
                                                  • You may have loose stool when taking this medicine, but it should get better soon after finishing the course. If the diarrhea worsens, tell your doctor.
                                                  Learn more
                                                  More about KeflexSide effectsReviews & ratingsAlternativesFDA package insert
                                                  Have you used Keflex (Cephalexin)?
                                                  Worth itNot sureNot worth it
                                                  More about BactrimSide effectsReviews & ratingsFDA package insert
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                                                  Worth itNot sureNot worth it