Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Trihexyphenidyl and Gocovri (amantadine) are both used to treat movement problems in Parkinson's disease (PD), but they work differently and have different dosing schedules. Trihexyphenidyl is an anticholinergic that blocks acetylcholine to help with tremors and movement-related side effects from other medications. It's taken multiple times a day and is available in both tablet and oral liquid forms. Common side effects include dry mouth, blurry vision, and dizziness. On the other hand, Gocovri is an N-methyl-D-aspartate (NMDA) antagonist that helps with uncontrolled movements (dyskinesia) and "off" episodes caused by levodopa-containing medications. It's taken once a day at bedtime and can be sprinkled on food if you have trouble swallowing pills. Common side effects include hallucinations, dizziness, and dry mouth. Gocovri is not safe during pregnancy and can interact with live vaccines, while trihexyphenidyl can cause more side effects in older adults and should be avoided if you have narrow-angle glaucoma.
Trihexyphenidyl
Gocovri (amantadine)
Trihexyphenidyl
Gocovri (amantadine)
Summary of Artane vs. Gocovri
Summary for Anticholinergic
Prescription only
Trihexyphenidyl is an anticholinergic medication that blocks acetylcholine, a chemical that affects movement. It's used to help with tremors in adults with Parkinson's disease (PD). It can also ease movement-related side effects caused by other medications. Trihexyphenidyl is taken by mouth, sometimes multiple times a day. It's available as tablets and an oral liquid. Common side effects of this medication include dry mouth, blurry vision, dizziness, and nausea. The brand name Artane has been discontinued, so trihexyphenidyl is generic only.
Summary for NMDA antagonist
Prescription only
Gocovri (amantadine) is an NMDA antagonist. It's taken by adults with Parkinson’s disease (PD) to ease sudden uncontrolled movements (dyskinesia) caused by levodopa-containing PD medications. It can also help prevent "off" episodes of levodopa/carbidopa medications, like Sinemet. Gocovri (amantadine) is taken by mouth once a day at nighttime. Common side effects of this medication include hallucinations, dizziness, and dry mouth.