Compare Klonopin vs. Effexor

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

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Klonopin (clonazepam)

Prescription only

Effexor (venlafaxine)

Prescription only
Controls seizures and helps panic attacks.

Klonopin (clonazepam) can be used for immediate relief of panic attacks and seizures, but is not intended for long-term management.

3.8/ 5 average rating with 767 reviewsforKlonopin
Improves mood and helps you relax.

Effexor (venlafaxine) is good for treating depression and anxiety, but it can cause more withdrawal symptoms if you stop suddenly compared to other antidepressants.

3.7/ 5 average rating with 577 reviewsforEffexor
Upsides
  • More people who took Klonopin (clonazepam) were free of panic attacks, compared to people who did not take Klonopin (clonazepam).
  • Klonopin (clonazepam) works quickly, within the hour.
  • Can be used together with antidepressants to manage panic disorder.
  • Klonopin (clonazepam) lasts longer and has less severe withdrawal symptoms compared to other similar medicines.
  • Effexor (venlafaxine) effectively treats depression, anxiety, and panic disorder.
  • Effexor (venlafaxine) causes more sleepiness than other antidepressants, so it's beneficial for people who have trouble sleeping.
  • Effexor (venlafaxine) might work when other antidepressants haven't worked since it affects two chemicals in the brain that impact your mood.
  • Effexor (venlafaxine) has several uses, which may be good for people with multiple conditions.
  • Effexor (venlafaxine) is available in generic, which is cheaper.
Downsides
  • Klonopin (clonazepam) can cause memory problems, drowsiness, dizziness, and confusion.
  • Klonopin (clonazepam) can be habit-forming, so is not typically used for long-term treatment.
  • May require higher doses of Klonopin (clonazepam) over time to establish the same seizure control.
  • Effexor (venlafaxine) can cause side effects such as decreased libido and increased blood pressure.
  • Like most antidepressants, it can cause a higher risk of suicidal thoughts and behavior for people aged 24 years or younger.
  • Compared to other antidepressants, it's more likely to cause unpleasant withdrawal symptoms if you suddenly stop taking it and can causes more sleepiness.
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Used for
Dosage forms
  • Pill
  • Dissolving tablet
  • Pill
  • Extended release
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
577 reviews so far
62%
saidit'sworth it
51%
saiditworked well
23%
saidit'sa big hassle

Have you used Effexor (venlafaxine)?

Leave a review
Side effects
4possible side effects
  • Drowsiness
    37%
  • Depression
    7%
  • Abnormal coordination
    6%
  • Loss of full control of bodily movements
    5%
See more detailed side effects
39possible side effects
  • Nausea
    37%
  • Headache
    25%
  • Drowsiness
    23%
  • Dry mouth
    22%
  • Dizziness
    19%
  • Difficulty sleeping
    18%
  • Constipation
    15%
  • Nervousness
    13%
  • Weakness
    12%
  • Sweating
    12%
  • Abnormal ejaculation/orgasm
    12%
  • Loss of appetite
    11%
  • Diarrhea
    8%
  • Infection
    6%
  • Vomiting
    6%
  • Anxiety
    6%
  • Blurred vision
    6%
  • Impotence
    6%
  • Indigestion
    5%
  • Tremor
    5%
  • Abnormal dreams
    4%
  • Chills
    3%
  • Rash
    3%
  • Gas
    3%
  • Stiff muscles
    3%
  • Prickling/burning sensation
    3%
  • Yawn
    3%
  • Increased urination
    3%
  • Chest pain
    2%
  • Trauma
    2%
  • Increased blood pressure
    2%
  • Increased heart rate
    2%
  • Decreased libido
    2%
  • Agitation
    2%
  • Confusion
    2%
  • Thinking abnormal
    2%
  • Changes in taste
    2%
  • Ringing in the ears
    2%
  • Dilation of pupils
    2%
See more detailed side effects
Risks and risk factors
  • Sedation, respiratory depression, coma and death
    • Taking with opioids
    • Drinking alcohol
  • Dependence and withdrawal
    • Taking high dosage
    • Taking long-term
    • History of drug abuse
  • Driving impairment
    • Drinking alcohol
    • Taking other medicines that make you less alert
  • Suicidal behavior and ideation
See more detailed risks and warnings
  • Suicidal thoughts or behavior
    • Age 24 years or younger
  • Serotonin syndrome
    • Taking tricyclic antidepressants, lithium, tramadol, fentanyl, amphetamines, certain headache medications (triptans), St. John's Wort
  • Withdrawal
    • Stopping Effexor (venlafaxine) suddenly
  • Increased bleeding
    • Taking other blood-thinning drugs (including aspirin, NSAIDs such as Advil, warfarin)
  • Increased blood pressure
    • Bipolar disorder
      • History of bipolar disorder
      • At risk for bipolar disorder
    See more detailed risks and warnings