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Symmetrel
Symmetrel Symmetrel is a brand name for amantadine hydrochloride, a drug with antiviral and antiparkinsonian effects.
Symmetrel is a brand name for amantadine hydrochloride, a drug with antiviral and antiparkinsonian effects. In brain-related use, it is described as affecting dopamine activity and also having some influence on NMDA- and acetylcholine-related signaling.