Compare Klonopin vs. Valium

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

Klonopin
(clonazepam)

Valium
(diazepam)

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.Helps you relax. Valium (Diazepam) is okay for occasional or short-term use (up to 4 weeks) for anxiety and for pain and sleeplessness from muscle spasm. Less severe withdrawal symptoms compared to similar drugs.
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Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
5.18Klonopin
Reviews for Klonopin (clonazepam)
70%
of people (All ages) say Klonopin (clonazepam) is worth it
52%
say it works well
14%
say it's a big hassle
767 reviews
Have you used Klonopin (clonazepam)?
Worth itNot sureNot worth it
Reviews for Valium (diazepam)
70%
Same vs. Klonopin (clonazepam)
53%
+1% better vs. Klonopin (clonazepam)
15%
-1% worse vs. Klonopin (clonazepam)
976 reviews
Have you used Valium (diazepam)?
Worth itNot sureNot worth it
Side effects
KlonopinValium
  • 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 »

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

More about Valium side effects »
How it works
KlonopinValium
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.Valium (Diazepam) 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
KlonopinValium
Prescription only
Prescription only
Available as
KlonopinValium
  • Pill
  • Dissolving tablet
  • Pill
  • Liquid
  • Rectal gel
Used for
KlonopinValium
Risk factors for serious side effects
KlonopinValium
  • Taking more than the prescribed dose
  • Taking longer than 4 weeks
  • History of drug abuse
  • Long-term use
    • Alcohol
    • Taking other medicines that make you less alert
      Detailed Klonopin (clonazepam) risks & warnings »
      • Taking more than the prescribed dose
      • Taking longer than 4 weeks
      • History of drug abuse
      • Long-term use
        • Alcohol
        • Taking other medicines that make you less alert
          • Current liver problems
          Detailed Valium (diazepam) 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.

          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.

          Alcohol
          KlonopinValium
          • 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.
          • Not safe to use with alcohol.
          Kidneys and liver
          KlonopinValium
          No kidneys and liver related info.
          • Processed by the liver, so might not be the best choice if you have liver problems.
          Sleep
          KlonopinValium
          • Can cause memory problems, drowsiness, dizziness, and confusion.
          • Can cause dizziness, drowsiness, and salivation.
          • Can cause memory problems, drowsiness, dizziness, and confusion.
          • Can cause temporary dizziness and drowsiness.
          Upsides and benefits
          KlonopinValium
          • 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.
          • 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).
          • Effective at relieving muscle spasms caused by a variety of conditions.
          • Less severe withdrawal symptoms compared to other benzodiazepines.
          Downsides and risks
          KlonopinValium
          • 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.
          • Processed by the liver, so might not be the best choice if you have liver problems.
          • 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
          KlonopinValium
          • 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.
          • Good for short-term relief of anxiety symptoms.
          • Starts working in 30 minutes when swallowed.
          • Helpful with muscle spasms.
          • Can cause temporary dizziness and drowsiness.
          • Addictive. Long-term use can cause dependence or abuse.
          • Not safe to use with alcohol.
          Learn more
          More about KlonopinSide effectsReviews & ratingsAlternativesFDA package insert
          Have you used Klonopin (clonazepam)?
          Worth itNot sureNot worth it
          More about ValiumSide effectsReviews & ratingsAlternativesFDA package insert
          Have you used Valium (diazepam)?
          Worth itNot sureNot worth it