Compare Provigil vs. Kapvay

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

Provigil (modafinil)

Prescription only

Kapvay (clonidine)

Prescription only
Improves alertness.

Provigil (modafinil) is effective in improving alertness, but it interacts with some medicines and shouldn't be used long-term.

4.2/ 5 average rating with 28 reviewsforProvigil
Treats attention deficit hyperactivity disorder.

Kapvay (clonidine) is one of the few medicines for ADHD that isn't a stimulant and not addictive, but it can lower your blood pressure.

Upsides
  • Provigil (modafinil) is a nonstimulant medication that improves alertness.
  • Provigil (modafinil) is available in a cheaper, generic version.
  • Provigil (modafinil) is good at decreasing excessive sleepiness in shift work sleep disorder.
  • If you need to sleep in the daytime, this medication won't effect you.
  • Can be used alone or together with a stimulant-type medicine to treat ADHD.
  • Also treats blood pressure and some nervous system and psychiatric conditions.
  • Kapvay (clonidine) is available in generic.
Downsides
  • Provigil (modafinil) can be habit forming, so it shouldn't be used for long-term treatment.
  • Provigil (modafinil) is not a good choice if you have liver problems.
  • May not be a good option if you are taking hormonal contraception like birth control pills.
  • Kapvay (clonidine) is not a first choice medicine to treat ADHD.
  • Kapvay (clonidine) can make you feel very dizzy or cause low blood pressure.
  • Stopping Kapvay (clonidine) suddenly can cause your blood pressure to jump and your heart to beat very fast.
  • It can take up to two weeks of taking Kapvay (clonidine) to notice any changes in behavior.
  • Kapvay (clonidine) has to be swallowed whole, which can be hard for some children to do.
Used for
Dosage forms
  • Pill
  • Extended release
Price
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Reviews
28 reviews so far
82%
saidit'sworth it
71%
saiditworked well
4%
saidit'sa big hassle

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Side effects
25possible side effects
  • Headache
    34%
  • Nausea
    11%
  • Nervousness
    7%
  • Stuffy nose
    7%
  • Back pain
    6%
  • Diarrhea
    6%
  • Indigestion
    5%
  • Difficulty sleeping
    5%
  • Anxiety
    5%
  • Dizziness
    5%
  • Flu symptoms
    4%
  • Dry mouth
    4%
  • Loss of appetite
    4%
  • Throat inflammation
    4%
  • Chest pain
    3%
  • High blood pressure
    3%
  • Fast heart beat
    2%
  • Palpitation
    2%
  • Dilation of blood vessels
    2%
  • Constipation
    2%
  • Abnormal liver function
    2%
  • Depression
    2%
  • Burning/tingling sensation
    2%
  • Drowsiness
    2%
  • Lung disorder
    2%
See more detailed side effects
12possible side effects
  • Sleepiness
    19%
  • Fatigue
    14%
  • Headache
    7%
  • Upper abdominal pain
    7%
  • Decreased appetite 
    6%
  • Dizziness
    5%
  • Insomnia
    4%
  • Aggression
    2%
  • Mood changes
    2%
  • Emotional disorders
    2%
  • Irritability
    2%
  • Stuffy nose
    2%
See more detailed side effects
Risks and risk factors
  • Serious allergic reactions
    • Allergy to Provigil (modafinil)
  • Heart problems
    • History of heart problems
  • Increased side effects
    • Current kidney problems
    • Current liver problems
  • Driving impairment
    • Taking with alcohol or drugs
See more detailed risks and warnings
  • Low blood pressure and low heart rate
  • Sleepiness
    • Taking with alcohol
    • Taking other medicines that make you less alert
  • High blood pressure
    • Stopping Kapvay (clonidine) suddenly
See more detailed risks and warnings