Procyclidine Hydrochloride


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Procyclidine Hydrochloride


Class: Anticholinergic Agents
VA Class: AU350
CAS Number: 1508-76-5
Brands: Kemadrin


Antimuscarinic antiparkinsonian agent.b

Uses for Procyclidine Hydrochloride Parkinsonian Syndrome

Adjunctive treatment of all forms of parkinsonian syndrome.a

May be used as monotherapy for mild to moderate symptoms or in combination with other antiparkinsonian agents for severe symptoms.a

Relieves muscle rigidity better than it does tremor; however, tremor, fatigue, weakness, and sluggishness frequently are relieved.a b

Drug-Induced Extrapyramidal Reactions

Control of extrapyramidal reactions induced by antipsychotic agents (e.g., phenothiazines).a b

Procyclidine Hydrochloride Dosage and Administration Administration

Administer orally, preferably after meals.a b


Available as procyclidine hydrochloride; dosage expressed in terms of the salt.a

Adjust dosage carefully according to individual requirements and response.a b

Adults Parkinsonian Syndrome

Younger and postencephalitic patients require and tolerate a higher dosage than geriatric patients or those with arteriosclerosis.a b

Therapy-Naive Patients Oral

Initially, 2.5 mg 3 times daily after meals.a As tolerated, gradually increase to 5 mg 3 times daily or the minimum dosage needed to control symptoms.a If needed, administer an additional 5-mg dose at bedtime.a b

If bedtime dosage is not tolerated, total daily dosage may be administered in 3 divided doses.b

Patients Transferring from Other Antiparkinsonian Therapy Oral

Gradually substitute 2.5 mg 3 times daily for all or part of original drug.a Increase procyclidine dose as needed while decreasing other drug until complete replacement achieved. a

Drug-Induced Extrapyramidal Reactions Oral

Initially, 2.5 mg 3 times daily; increase by 2.5-mg increments until symptoms controlled.a b

Usual dosage: 10–20 mg daily.a a

Special Populations

No special population dosage recommendations at this time.a

Cautions for Procyclidine Hydrochloride Contraindications

Angle-closure glaucoma.a c

Known hypersensitivity to procyclidine or any ingredient in the formulation.c

Warnings/Precautions Warnings Pregnancy

Safe use during pregnancy has not been established.a b

General Precautions Cardiovascular Effects

Caution in tachyarrhythmias because antimuscarinics block vagal inhibition of the SA nodal pacemaker.a c

GU Effects

Possible decreased tone and amplitude of contractions of the ureters and bladder with resultant urinary retention;c use with caution in patients with prostatic hypertrophy.a c


Use with caution and carefully monitor hypotensive patients.a

CNS Effects

Possible mental confusion, disorientation, agitation, hallucinations, and psychotic-like symptoms, particularly in older patients.a

Ophthalmic Effects

Possible increased ocular tension.c

Contraindicated in patients with angle-closure glaucoma; however, can be administered safely to patients with open-angle glaucoma.a c

Specific Populations Pregnancy

Category C.d (See Warnings under Cautions.)

Pediatric Use

Safety and efficacy not established.a b

Geriatric Use

Possible increased incidence of adverse CNS effects compared with younger adults.a (See CNS Effects under Cautions.)

Common Adverse Effects

Dry mouth, blurred vision, nausea, vomiting, epigastric distress, constipation, lightheadedness, muscular weakness.a

Interactions for Procyclidine Hydrochloride Specific Drugs




Anticholinergic agents

Increased risk of adverse anticholinergic effectsc

Antipsychotic agents (phenothiazines)

Risk of intensification of mental symptoms or precipitation of toxic psychosis, especially when increasing procyclidine dosagea (see CNS Effects under Cautions)

Monitor closelya

Stability Storage Oral Tablets



Exhibits atropine-like action and exerts antispasmodic effects on parasympathetic-innervated peripheral structures including smooth muscle.a b

Competitively inhibits acetylcholine or other cholinergic stimuli at autonomic effectors innervated by postganglionic nerves.c

Antagonizes certain muscarinic effects; may produce mydriasis and reduction in salivation.a

Advice to Patients

Potential for drug to impair mental alertness or physical coordination; use caution when driving or operating machinery until effects on individual are known.a

Importance of informing clinicians of existing or contemplated concomitant therapy, including prescription and OTC drugs and dietary or herbal supplements, as well as concomitant illnesses.a

Importance of women informing clinicians if they are or plan to become pregnant or plan to breast-feed.a

Importance of informing patients of other important precautionary information. (See Cautions.)


Excipients in commercially available drug preparations may have clinically important effects in some individuals; consult specific product labeling for details.

Procyclidine Hydrochloride


Dosage Forms


Brand Names




5 mg

Kemadrin (scored)



This report on medications is for your information only, and is not considered individual patient advice. Because of the changing nature of drug information, please consult your physician or pharmacist about specific clinical use.

The American Society of Health-System Pharmacists, Inc. and represent that the information provided hereunder was formulated with a reasonable standard of care, and in conformity with professional standards in the field. The American Society of Health-System Pharmacists, Inc. and make no representations or warranties, express or implied, including, but not limited to, any implied warranty of merchantability and/or fitness for a particular purpose, with respect to such information and specifically disclaims all such warranties. Users are advised that decisions regarding drug therapy are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and the information is provided for informational purposes only. The entire monograph for a drug should be reviewed for a thorough understanding of the drug's actions, uses and side effects. The American Society of Health-System Pharmacists, Inc. and do not endorse or recommend the use of any drug. The information is not a substitute for medical care.

AHFS Drug Information. © Copyright, 1959-2011, Selected Revisions October 2007. American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland 20814.


a. Monarch Pharmaceuticals, Inc. Kemadrin (procyclidine hydrochloride) tablets prescribing information. Bristol, TN; 2003 Jun.

b. AHFS drug information 2006. McEvoy GK, ed. Procyclidine. Bethesda, MD: American Society of Health-System Pharmacists; 2006:1255-6.

c. AHFS drug information 2006. McEvoy GK, ed. Antimuscarinics/Antispasmodics General Statement. Bethesda, MD: American Society of Health-System Pharmacists; 2006:1257-64].

d. Briggs GG, Freeman RK, Yaffe SJ. Drugs in pregnancy and lactation, 7th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2005:1349.

More Procyclidine Hydrochloride resources Procyclidine Hydrochloride Side Effects (in more detail)Procyclidine Hydrochloride Use in Pregnancy & BreastfeedingProcyclidine Hydrochloride Drug InteractionsProcyclidine Hydrochloride Support Group3 Reviews for Procyclidine Hydrochloride - Add your own review/rating Compare Procyclidine Hydrochloride with other medications Extrapyramidal ReactionParkinson's DiseaseParkinsonian TremorParkinsonism

Procyclidine Hydrochloride

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