Compare Klonopin vs. Ativan

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

Klonopin (Clonazepam)

Prescription only

Ativan (lorazepam)

Prescription only
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.

3.8/ 5 average rating with 767 reviewsforKlonopin
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.

3.8/ 5 average rating with 642 reviewsforAtivan
Upsides
  • 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.
  • 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.
Downsides
  • 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.
  • 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.
Used for
Dosage forms
  • Pill
  • Dissolving tablet
  • Pill
  • Liquid
  • Injection
Price
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Reviews
767 reviews so far
70%
saidit'sworth it
52%
saiditworked well
14%
saidit'sa big hassle

Have you used Klonopin (Clonazepam)?

Leave a review
642 reviews so far
71%
saidit'sworth it
51%
saiditworked well
15%
saidit'sa big hassle

Have you used Ativan (lorazepam)?

Leave a review
Side effects
19possible side effects
  • Somnolence
    37%
  • Dizziness
    8%
  • Upper Respiratory Tract Infection
    8%
  • Depression
    7%
  • Fatigue
    7%
  • Coordination Abnormal
    6%
  • Ataxia
    5%
  • Memory Disturbance
    4%
  • Sinusitis
    4%
  • Influenza
    4%
  • Nervousness
    3%
  • Dysmenorrhea
    3%
  • Dysarthria
    2%
  • Intellectual Ability Reduced
    2%
  • Rhinitis
    2%
  • Coughing
    2%
  • Pharyngitis
    2%
  • Constipation
    2%
  • Allergic Reaction
    2%
See more detailed side effects
4possible side effects
  • Sleepiness
    16%
  • Dizziness
    7%
  • Weakness
    4%
  • Unsteadiness
    3%
See more detailed side effects
Risks and risk factors
  • Tolerance and dependence
    • Taking more than the prescribed dose
    • Taking longer than 4 weeks
    • History of drug abuse
  • Withdrawal
    • Long-term use
  • Pregnancy
  • Driving impairment
    • Alcohol
    • Taking other medicines that make you less alert
  • Memory problems
See more detailed risks and warnings
  • Severe sedation with opioid use
    • Taking with opioids
  • Tolerance and dependence
    • Taking more than the prescribed dose
    • Taking Ativan (lorazepam) for longer than 4 weeks
    • History of drug abuse
  • Withdrawal
    • Long-term use
  • Driving impairment
    • Alcohol
    • Taking other medicines that make you less alert
  • Memory problems
See more detailed risks and warnings