Generic name: procyclidine hydrochloride
Dosage form: tablets
Medically reviewed on August 3, 2018.
For Parkinsonism: The dosage of the drug for the treatment of parkinsonism depends upon the age of the patient, the etiology of the disease, and individual responsiveness. Therefore, the dosage must remain flexible to permit adjustment to the individual tolerance and requirements of each patient. In general, younger and postencephalitic patients require and tolerate a somewhat higher dosage than older patients and those with arteriosclerosis.
For Patients Who Have Received No Other Therapy: The usual dose of procyclidine hydrochloride for initial treatment is 2.5 mg administered three times daily after meals. If well tolerated, this dose may be gradually increased to 5 mg three times a day and occasionally 5 mg given before retiring. In some cases smaller doses may be employed with good therapeutic results.
Occasionally a patient is encountered who cannot tolerate a bedtime dose of the drug. In such cases it may be desirable to adjust dosage so that the bedtime dose is omitted and the total daily requirement is administered in three equal daytime doses. It is best administered during or after meals to minimize the development of side reactions.
To Transfer Patients to KEMADRIN from Other Therapy: Patients who have been receiving other drugs may be transferred to procyclidine hydrochloride. This is accomplished gradually by substituting 2.5 mg three times a day for all or part of the original drug. The dose of procyclidine is then increased as required while that of the other drug is correspondingly omitted or decreased until complete replacement is achieved. The total daily dosage may then be adjusted to the level which produces maximum benefit.
For Drug-Induced Extrapyramidal Symptoms: For treatment of symptoms of extrapyramidal dysfunction induced by tranquilizer drugs during the therapy of mental disorders, the dosage of procyclidine hydrochloride will depend on the severity of side effects associated with tranquilizer administration. In general, the larger the dosage of the tranquilizer, the more severe will be the associated symptoms, including rigidity and tremors. Accordingly, the drug dosage should be adjusted to suit the needs of the individual patient and to provide maximum relief of the induced symptoms. A convenient method to establish the daily dosage of procyclidine is to begin with the administration of 2.5 mg three times daily. This may be increased by 2.5 mg daily increments until the patient obtains relief of symptoms. In most cases excellent results will be obtained with 10 to 20 mg daily.
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