Symptoms of tardive dyskinesia, a kind of involuntary movement, didn't show up in the study.

FORBES: A Victory For Lilly--With Reservations

Too much medication can cause dyskinesia, and too little can result in paralysis.

FORBES: Putting A Patch On Parkinson's Disease

It is still the most efficacious drug, but long-term use can result in dyskinesia (jerky, involuntary movements) and levodopa can lose its beneficial effects over time.

FORBES: Putting A Patch On Parkinson's Disease

In the Alabama case, a consumer took Reglan and developed tardive dyskinesia, which causes incurable and involuntary muscle movements, and accused Wyeth, which is now owned by Pfizer, of failing to warn of the risk of long-term use.

FORBES: Pfizer Wants Court To Rehear Generic Labeling Case And Avoid Tort Hell