Quote from the Dystonia Medical Research Foundation (DMRF)web site: "A large numbers of drugs are capable of causing dystonia. In most cases, people develop an acute dystonic reaction resulting after a one-time exposure. The symptoms are usually transient and may be treated successfully with medications such as Benadryl.
Another type of drug-induced dystonia is called tardive dystonia. Tardive dystonia and tardive dyskinesia are neurologic syndromes caused by exposure to certain drugs, namely a class of medications called neuroleptics which are used to treat psychiatric disorders, some gastric conditions, and certain movement disorders. The amount of exposure to such drugs varies greatly among patients. Tardive dystonias and dyskinesias may also develop as a symptom of prolonged treatment with levodopa in some Parkinson's patients.
Drugs belonging to this class of neuroleptics include: (trade name listed in parenthesis): Acetohenazine (Tindal®), Amoxapine (Asendin®), Chlorpromazine (Thorazine®), Fluphenazine (Permitil®, Prolixin®), Haloperidol (Haldol®). Loxapine (Loxitane®, Daxolin®), Mesoridazine (Serentil®), Metaclopramide (Reglan®), Molinndone (Lindone®, Moban®), Perphanzine (Trilafrom® or Triavil®), Piperacetazine (Quide®), Prochlorperzine (Compazine®, Combid®), Promazine (Sparine®), Promethazine (Phenagran®), Thiethylperazine (Torecan®), Thioridazine (Mellaril®), Thiothixene (Navane®),Trifluoperazine (Stelazine®), Triflupromazine (Vesprin®), and Trimeprazine (Temaril®). "
Please understand that Dystonia as mentioned by DMRF refers to involuntary muscle spasms anywhere in the body and not necessarily vocal cords per se.
