Cyclid5 mg

Cyclid is an anticholinergic (antimuscarinic) agent used for the following established indications:

• Parkinson's disease (adjunctive treatment): Cyclid is used as an adjunct in the treatment of all forms of parkinsonism, including idiopathic (primary), postencephalitic, and arteriosclerotic parkinsonism. It is generally used together with other antiparkinsonian agents rather than as sole therapy for moderate-to-severe disease.
• Drug-induced extrapyramidal symptoms (established use): Cyclid is indicated for the control of extrapyramidal symptoms (parkinsonism-like reactions, akathisia, and acute dystonic reactions) caused by antipsychotic (neuroleptic) medications such as phenothiazines and other first-generation antipsychotics.

Cyclid works by reducing the relative excess of cholinergic activity that occurs in these conditions, thereby improving tremor, rigidity, and muscle spasm.

Each tablet contains Procyclidine Hydrochloride as the active ingredient. Procyclidine Hydrochloride is also available in some markets as an injectable solution for acute dystonic reactions. Strength and formulation vary by manufacturer; refer to the specific product label for exact composition.

Cyclid is a synthetic tertiary amine anticholinergic (antimuscarinic) drug structurally related to trihexyphenidyl. It is used clinically to treat parkinsonism and drug-induced extrapyramidal reactions by blocking excess cholinergic (acetylcholine-mediated) activity in the central nervous system.

Cyclid has a long history of clinical use, dating back several decades, and remains a standard treatment option for antipsychotic-induced movement disorders and as adjunctive therapy in Parkinson's disease.

Cyclid belongs to the anticholinergic (antimuscarinic) class of drugs, specifically the antiparkinsonian anticholinergic agents, also referred to as antispasmodic agents used in movement disorders.

Procyclidine Hydrochloride is a synthetic anticholinergic agent that acts primarily by blocking muscarinic acetylcholine receptors in the central nervous system, particularly within the basal ganglia.

In parkinsonism and drug-induced extrapyramidal syndromes, there is a relative excess of cholinergic activity compared to dopaminergic activity in the basal ganglia. By blocking central muscarinic receptors, Procyclidine Hydrochloride helps restore the dopaminergic-cholinergic balance, reducing tremor, rigidity, and drooling, and improving acute dystonic reactions and akathisia caused by antipsychotic drugs.

Procyclidine Hydrochloride also has peripheral antimuscarinic (atropine-like) effects, which account for common side effects such as dry mouth, blurred vision, constipation, and urinary retention.

Cyclid tablets are taken by mouth, generally after meals, with a full glass of water. Doses should be spaced evenly through the day as directed by the physician. Swallow tablets whole; do not crush or chew unless advised otherwise. Consistency in timing helps maintain steady control of symptoms.

The following clinically significant interactions have been reported with Cyclid:

• Other anticholinergic (antimuscarinic) drugs (e.g., certain antihistamines, tricyclic antidepressants, other antiparkinsonian anticholinergics): concurrent use with Cyclid can produce additive anticholinergic effects such as severe dry mouth, blurred vision, constipation, urinary retention, and confusion, particularly in elderly patients.
• CNS depressants and alcohol: concurrent use with Cyclid may increase sedation, dizziness, and impairment of mental/physical abilities.
• Antipsychotic medications (phenothiazines and other neuroleptics): Cyclid is often used together with antipsychotics to treat extrapyramidal side effects; however, it may mask the early signs of tardive dyskinesia. Combined anticholinergic burden with certain antipsychotics may also worsen cognitive side effects.
• Digoxin: Cyclid can slow gastrointestinal motility, which may increase the absorption and serum levels of digoxin; monitoring is advised when the two are used together.

Side effects of Cyclid are mostly related to its anticholinergic activity:

• Common: dry mouth, blurred vision, dizziness, mild nausea, constipation, and urinary hesitancy.
• Less common: nervousness, drowsiness, weakness, tachycardia (fast heartbeat), and skin rash.
• Important/serious effects (especially in elderly patients): confusion, disorientation, agitation, memory impairment, and hallucinations. Elderly patients are particularly sensitive to these central anticholinergic effects (see Use in Special Populations).
• Euphoria and abuse potential: Cyclid and related anticholinergic antiparkinsonian agents have a recognized potential for misuse due to euphoric effects at higher-than-prescribed doses; physicians should monitor for signs of misuse, especially in patients with a history of substance use disorder.

Patients should seek medical advice if side effects are severe or persistent.

Pregnancy: There are no well-controlled studies establishing the safety of Cyclid in human pregnancy. Cyclid should be used during pregnancy only if clearly needed and if the potential benefit justifies the potential risk to the fetus. A physician should be consulted before use.

Lactation: It is not well established whether Cyclid passes into breast milk. Because many anticholinergic drugs can reduce milk production and may affect the infant, Cyclid should be used during breastfeeding only under medical supervision, weighing benefits against potential risks to the infant.

• Elderly patients: Use Cyclid with caution in elderly patients, who are more sensitive to anticholinergic effects such as confusion, memory impairment, hallucinations, and falls. Start with the lowest effective dose.
• Do not stop abruptly: In patients on long-term therapy, Cyclid should not be discontinued suddenly, as abrupt withdrawal may cause rebound extrapyramidal symptoms; dose should be tapered gradually under medical supervision.
• Hot weather / heat exposure: Cyclid can decrease sweating, increasing the risk of heat exhaustion or heatstroke in hot environments or with strenuous activity.
• Cardiac conditions: Use with caution in patients with tachycardia or cardiac arrhythmias, as Cyclid can increase heart rate.
• Risk of misuse: Monitor for signs of euphoria-seeking misuse or abuse, particularly in patients with psychiatric illness or a history of substance use disorder.
• Driving and operating machinery: Cyclid may cause blurred vision, dizziness, or drowsiness; patients should use caution until they know how it affects them.
• For contraindicated conditions (e.g., narrow-angle glaucoma, urinary retention, GI obstruction, myasthenia gravis), see Contraindications.

Overdose with Cyclid can produce an exaggeration of anticholinergic effects, including severe dry mouth, blurred vision, dilated pupils, flushed and hot skin, high body temperature, rapid heartbeat, agitation, confusion, hallucinations, and in severe cases seizures or loss of consciousness.

Suspected overdose of Cyclid is a medical emergency. Seek immediate medical attention or contact emergency services/poison control right away. Do not attempt to treat an overdose at home. Management is supportive and should only be carried out by trained medical personnel in a hospital setting.

Store at room temperature (below 30°C), away from light and moisture. Keep out of reach of children.

Elderly: Elderly patients are more susceptible to the central and peripheral anticholinergic effects of Cyclid, including confusion, memory disturbance, hallucinations, constipation, and urinary retention. Lower starting doses and careful monitoring are recommended.

Pediatric patients: Safety and efficacy of Cyclid in children have not been established; it is generally not recommended for pediatric use except under specialist supervision for specific drug-induced dystonic reactions.

Renal/hepatic impairment: There is limited specific dosing data for renal or hepatic impairment; such patients should be started on a lower dose with close monitoring, as impaired clearance may increase the risk of anticholinergic toxicity.

Pregnancy and lactation: See Pregnancy and Lactation section.

The duration of Cyclid treatment depends on the underlying condition. For drug-induced acute extrapyramidal symptoms, it is often used for a limited period until the causative antipsychotic dose is adjusted or the symptoms resolve, with periodic reassessment (e.g., every few months) of continued need. For Parkinson's disease, Cyclid may be used longer-term as part of an adjunctive regimen, guided by ongoing physician review of benefit versus anticholinergic side-effect burden.

Anticholinergics; Antiparkinsonian agents; Antimuscarinic agents

Procyclidine Hydrochloride works by blocking central muscarinic acetylcholine receptors in the basal ganglia, correcting the relative excess of cholinergic activity that occurs in parkinsonism and antipsychotic-induced extrapyramidal reactions, thereby reducing tremor, rigidity, and dystonic muscle spasm.

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Safety and efficacy of Cyclid in pediatric patients have not been established. Cyclid is generally not recommended for routine use in children. In practice, it may occasionally be used by specialists for management of acute drug-induced dystonic reactions in children under close medical supervision, but this is not a standard labeled pediatric indication.