Compare Cogentin vs. Symmetrel

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

Treats Parkinson's disease.

Good for treating tremors caused by Parkinson's and for treating uncontrolled movements in people taking antipsychotics.

Treats Parkinson's disease, the flu, and side effects from antipsychotic drugs.

Symmetrel (amantadine) is a generic medicine that can be used alone, or with other medicines to treat early Parkinson's disease.

  • Cogentin (benztropine) can be used with other medicines for people with more advanced Parkinson's who continue to have tremors.
  • Works by itself in people under 65 who only have Parkinson's tremors and not other symptoms.
  • Can be used in people who have movement problems because they're taking antipsychotic drugs.
  • Available as generic.
  • Symmetrel (amantadine) can be taken by itself or with other medicines to treat the symptoms of early Parkinson's disease, including muscle spasms, tremors, and difficulty with movements.
  • Symmetrel (amantadine) is available in generic and in both a pill and liquid form.
  • Compared to other medicines for Parkinson's disease, the side effects are relatively mild.
  • Only treats the tremors in Parkinson's and not the other symptoms.
  • Not recommended in people over 65 or those with memory difficulties or problems thinking clearly because they're more likely to have confusion with Cogentin (benztropine).
  • Can't be used in people who have glaucoma.
  • Symmetrel (amantadine) sometimes has to be taken multiple times a day.
  • Symmetrel (amantadine) can’t stop or cure Parkinson's disease. It can only slow down the progression.
  • You can't take certain forms of the flu vaccine if you're taking Symmetrel (amantadine). Talk to your doctor before receiving vaccines.
  • You can't stop taking Symmetrel (amantadine) suddenly without talking to your doctor since your Parkinson's can get worse.
Used for
Dosage forms
  • Pill
  • Injection
  • Pill
  • Liquid
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Side effects
The Cogentin (benztropine) FDA package insert doesn’t have numbers about how common side effects are.
The Symmetrel (amantadine) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Intestinal paralysis
    • Taking tricyclic antidepressants
    • Taking phenothiazines or haloperidol
  • Weakness
  • Dehydration
    • Over age 65
    • Dehydration
  • Heat stroke
    • Dehydration
    • Prolonged exposure to hot conditions
    • Alcohol
    • Manual laborers
  • Memory problems and confusion
    • Over age 65
    • History of mental or psychiatric conditions
See more detailed risks and warnings
  • Deaths from overdosage
    • Kidney damage or failure
  • Higher risk of suicide
    • Taking Symmetrel (amantadine) for the flu
  • Higher risk of seizures
    • History of seizures
  • Heart failure
    • Heart failure
    • History of swelling in the arms or legs
  • Lack of impulse control
    • Taking other medicines for Parkinson's disease
See more detailed risks and warnings