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
Button Group. All currently active
Button Group. All currently active
5.1322901849217635Klonopin
Reviews for Klonopin (Clonazepam)
69%
of people say Klonopin (Clonazepam) is worth it
51%
say it works well
15%
say it's a big hassle
Reviews for Valium (Diazepam)
69%
Same vs. Klonopin (Clonazepam)
52%
+1% vs. Klonopin (Clonazepam)
16%
1% vs. Klonopin (Clonazepam)
Side effects
KlonopinValium
  • Dizziness 8%
  • Low mood disorder 7%
  • Ear, nose, or throat infection 6%
  • Sinus inflammation 5%
  • Fatigue 5%
  • Menstrual cramps 4%
  • Memory disturbance 3%
  • Constipation 3%
  • Allergic reaction 3%
  • Vaginal inflammation 3%
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
Anti-anxiety
Benzodiazepine
Prescription only
Anti-anxiety
Benzodiazepine
Prescription only
Available as
KlonopinValium
  • Pill
  • Dissolving tablet
  • Pill
  • Liquid
  • Rectal gel
Used for (click to learn more)
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 category
          KlonopinValium
          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.
          • Not safe to use with alcohol.
          Food
          No specific food-related info.No specific food-related info.
          Kidneys and liver
          No specific kidneys and liver-related info.No specific kidneys and liver-related info.
          Sex
          No specific sex-related info.No specific sex-related info.
          Sleep
          • Can cause memory problems, drowsiness, dizziness, and confusion.
          • Can cause dizziness, drowsiness, and salivation.
          • Stopping Klonopin (Clonazepam) suddenly may cause withdrawal symptoms such as nausea, anxiety, agitation, flu-like symptoms, trouble sleeping, and muscle pain or burning. Withdrawal symptoms can last 6 weeks or longer. Work with your doctor to gradually reduce your dose when stopping or switching to a different medication.
          • Can cause memory problems, drowsiness, dizziness, and confusion.
          • Can cause temporary dizziness and drowsiness.
          • Stopping Valium (Diazepam) suddenly may cause withdrawal symptoms such as nausea, anxiety, agitation, flu-like symptoms, trouble sleeping, and muscle pain or burning. Withdrawal symptoms can last 6 weeks or longer. Work with your doctor to gradually reduce your dose.
          Weight
          No specific weight-related info.No specific weight-related info.
          Upsides and benefits
          KlonopinValium
          • Can be used alone or with other medicines to treat seizures.
          • 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).
          • Less severe withdrawal symptoms compared to other benzodiazepines.
          • Effective at relieving muscle spasms caused by a variety of conditions.
          • 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).
          • 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
          More about ValiumSide effectsReviews & ratingsAlternativesFDA package insert