Compare Ativan vs. Klonopin

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Ativan
(lorazepam)

Klonopin
(clonazepam)

Helps you relax. Ativan (lorazepam) is an effective medicine for occasional or short-term anxiety. It's less likely to have drug interactions, but more likely to cause withdrawal symptoms compared to similar drugs.Controls seizures and helps you relax. Klonopin (Clonazepam) is okay for occasional or short-term use (up to 4 weeks) for anxiety, and to treat seizures. Less severe withdrawal symptoms compared to similar drugs.
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
5.14Ativan
Reviews for Ativan
71%
of people (All ages) say Ativan is worth it
51%
say it works well
15%
say it's a big hassle
642 reviews
Have you used Ativan (lorazepam)?
Worth itNot sureNot worth it
Reviews for Klonopin
70%
+1% better vs. Ativan
52%
-1% worse vs. Ativan
14%
-1% worse vs. Ativan
767 reviews
Have you used Klonopin (clonazepam)?
Worth itNot sureNot worth it
Side effects
AtivanKlonopin
  • Sleepiness 16%
  • Dizziness 7%
  • Weakness 4%
  • Unsteadiness 3%
More Ativan side effects »
  • Drowsiness 50%
  • Lack of muscle coordination 30%
  • Behavior problems 25%
  • Ear, nose, or throat infection 6%
  • Fatigue 5%
  • Low mood disorder 6%
  • Dizziness 1%
  • Vaginal inflammation 3%
  • Sinus inflammation 1%
  • Inflammation inside the nose 2%
More Klonopin side effects »
How it works
AtivanKlonopin
Ativan (lorazepam) is a fast-acting benzodiazepine. It affects areas of the brain that help calm you down. This reduces anxiety and can cause sleepiness.Klonopin (Clonazepam) is a fast-acting benzodiazepine. It affects neurotransmitters in the brain and calms the nervous system. This reduces anxiety and muscle spasms, and causes sleepiness.
Type of medication
AtivanKlonopin
Prescription onlyPrescription only
Available as
AtivanKlonopin
  • Pill
  • Liquid
  • Injection
  • Pill
  • Dissolving tablet
Used for
AtivanKlonopin
Risk factors for serious side effects
AtivanKlonopin
  • Taking with opioids
  • Taking more than the prescribed dose
  • Taking Ativan (lorazepam) for longer than 4 weeks
  • History of drug abuse
  • Long-term use
Detailed Ativan (lorazepam) risks & warnings »
  • Taking more than the prescribed dose
  • Taking longer than 4 weeks
  • History of drug abuse
  • Long-term use
  • Alcohol
Detailed Klonopin (clonazepam) risks & warnings »
Pregnancy

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.

Interactions
AtivanKlonopin
  • Less likely to have drug interactions compared to other drugs like it, so it might be a better option if you're taking multiple medications.
No interactions related info.
Alcohol
AtivanKlonopin
  • Not safe to use with alcohol.
  • Can be habit-forming, so it's not typically used for long-term treatment or for people who've had problems with drug or alcohol abuse.
  • Not safe to use with alcohol.
  • Can be habit-forming, so it's not typically used for long-term treatment, or for people who've had problems with drug or alcohol abuse.
Sleep
AtivanKlonopin
  • Can cause temporary dizziness and drowsiness.
  • Can cause memory problems, drowsiness, dizziness, and confusion.
  • Can cause dizziness, drowsiness, and salivation.
  • Can cause memory problems, drowsiness, dizziness, and confusion.
Upsides and benefits
AtivanKlonopin
  • Effective at relieving short-term anxiety.
  • Can be used together with antidepressants to manage anxiety disorders. Especially helpful for anxiety symptoms while you wait for an antidepressant to kick in.
  • Less likely to have drug interactions compared to other drugs like it, so it might be a better option if you're taking multiple medications.
  • Effective at relieving short-term anxiety and sleeplessness.
  • Can be used together with antidepressants to manage anxiety disorders. Especially helpful for anxiety symptoms while you wait for an antidepressant to kick in (it can take several weeks).
  • Can be used alone or with other medicines to treat seizures.
  • Less severe withdrawal symptoms compared to other benzodiazepines.
Downsides and risks
AtivanKlonopin
  • Can cause memory problems, drowsiness, dizziness, and confusion.
  • Can be habit-forming, so it's not typically used for long-term treatment or for people who've had problems with drug or alcohol abuse.
  • Compared to other similar medicines, Ativan (lorazepam) is more likely to cause withdrawal if you take it for a long time and then suddenly stop.
  • Most people find that Ativan (lorazepam) gets less effective over time.
  • Can cause memory problems, drowsiness, dizziness, and confusion.
  • Can be habit-forming, so it's not typically used for long-term treatment, or for people who've had problems with drug or alcohol abuse.
  • Most people find that it gets less effective over time.
Tips from our pharmacists for people taking the medication
AtivanKlonopin
  • Can cause temporary dizziness and drowsiness.
  • Take only as much as your doctor prescribes. Taking more than directed or taking this for a long time can cause you to become dependent on it.
  • Not safe to use with alcohol.
  • Use caution or avoid use in older adults.
  • For the first week, avoid activities that require you to be alert.
  • Can cause dizziness, drowsiness, and salivation.
  • Report any confusion or inability to control muscle movements to your doctor.
  • Not safe to use with alcohol.
Learn more
More about AtivanSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Ativan (lorazepam)?
Worth itNot sureNot worth it
More about KlonopinSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Klonopin (clonazepam)?
Worth itNot sureNot worth it