Marzine (Cyclizine Hydrochloride)

Cyclizine Hydrochloride is an antihistamine used to manage conditions that involve nausea, vomiting, and motion‑related discomfort.

• Motion sickness: prevents and treats dizziness, vomiting, and nausea caused by travel.
• Nausea and vomiting of various origins: provides symptomatic relief for gastrointestinal upset.
• Post‑operative nausea: reduces incidence of nausea after surgical procedures.

• Cyclizine Hydrochloride acts as a competitive antagonist at peripheral H1 histamine receptors, reducing histamine‑mediated vestibular stimulation. It also exhibits anticholinergic activity, which diminishes vestibular‑cerebellar transmission, and possesses central antiemetic properties that suppress the vomiting centre in the brainstem.

Cyclizine may cause a range of adverse reactions, from mild to serious.

Common Side Effects

• Drowsiness: feeling unusually sleepy or fatigued.
• Dry mouth: reduced salivation leading to a cotton‑mouth sensation.
• Blurred vision: temporary difficulty focusing.
• Constipation: decreased bowel motility.
• Headache: mild to moderate head pain.
• Dizziness: sensation of light‑headedness.

Serious or Rare Side Effects

• Allergic reactions: rash, itching, swelling, or angioedema.
• Tachycardia: unusually fast heart rate.
• Confusion or delirium: altered mental status, especially in the elderly.
• Urinary retention: difficulty emptying the bladder.
• Severe hypotension: marked drop in blood pressure.
• Seizures: rare occurrence of convulsive episodes.

Before using Cyclizine Hydrochloride, consider the following safety points.

• Pregnancy: safety not established; consult a healthcare professional before use.
• Elderly: increased sensitivity to anticholinergic effects; monitor for confusion or falls.
• Driving: possible drowsiness; avoid operating machinery until response is known.
• Drug interactions: review all concomitant medications with a pharmacist or physician.
• Medical conditions: use cautiously in glaucoma, urinary retention, or prostate enlargement.
• Store at below 25°C: keep in the original pack, protect from moisture.

Cyclizine Hydrochloride can interact with several drug classes; awareness helps prevent adverse outcomes.

Major Interactions (Avoid)

• Monoamine oxidase inhibitors (MAOIs): risk of hypertensive crisis.
• Other anticholinergic agents: additive anticholinergic burden.
• Central nervous system depressants (alcohol, benzodiazepines): increased sedation.

Moderate Interactions (Monitor Closely):\n- Antihypertensives: possible enhancement of blood‑pressure‑lowering effect.

• Anticholinergic drugs: monitor for excessive dryness and constipation.
• Tricyclic antidepressants: may increase anticholinergic load and sedation.