Chlorpheniramine Maleate

Chlorpheniramine Maleate is a first-generation (sedating) antihistamine medicine available in Bangladesh under many brand names. Below are its uses, side effects and precautions — and every brand with its current price.

Chlorpheniramine Maleate is used for:

• Allergic rhinitis and hay fever — sneezing, runny and itchy nose, itchy watery eyes.
• Urticaria (hives) and itchy skin conditions — including allergic rashes and reactions to foods or medicines.
• Insect bites and stings — to relieve itching and swelling.
• Common cold symptoms — drying a runny nose, often within combination remedies.
• Itching of chickenpox and other conditions — particularly at night.
• Allergic reactions — as supportive treatment under medical supervision; severe anaphylaxis always needs emergency care first.

The side effects of Chlorpheniramine Maleate mostly stem from its action on the brain:

• Drowsiness and sleepiness — very common; reaction time slows even when you feel "only slightly" sleepy. Do not drive, ride a motorcycle or operate machines after taking it.
• Dry mouth, nose and throat.
• Dizziness, poor concentration, blurred vision.
• Constipation or difficulty passing urine — more likely in older men with prostate enlargement.
• Thickened airway secretions.
• Paradoxical excitement in children — restlessness or irritability instead of sleepiness.
• Elderly people are more prone to confusion, falls and urinary retention.

Take these precautions with Chlorpheniramine Maleate:

• No driving or machine operation after a dose — plan doses around travel and work; choose bedtime dosing where possible.
• Avoid alcohol and other sedatives — sleepiness multiplies dangerously.
• Tell your doctor if you have glaucoma, prostate enlargement or urinary difficulty, epilepsy, asthma or COPD, liver disease, or thyroid or heart problems.
• Elderly patients should use lower doses and prefer non-sedating alternatives where suitable.
• Do not combine with other cough-cold remedies that may already contain an antihistamine — risk of accidental double dosing.
• It is for short-term symptom relief; persistent allergy needs a doctor's assessment.

Interactions to know with Chlorpheniramine Maleate:

• Alcohol — strongly increases drowsiness and impairment; avoid completely while taking it.
• Sleeping pills, anxiolytics, opioid painkillers and sedating antidepressants — additive sedation and breathing suppression risk.
• MAO-inhibitor antidepressants — intensify and prolong the drying (anticholinergic) effects; combination contraindicated.
• Other anticholinergic drugs (some antispasmodics, tricyclic antidepressants, antiparkinson drugs) — added dry mouth, constipation, urinary retention and confusion.
• Phenytoin — its level may rise.
• Other antihistamines or combination cold remedies — duplication risk.

Chlorpheniramine Maleate should not be used in:

• Allergy to chlorpheniramine or any component.
• Newborns and premature infants — and not in children under 2 years without a doctor's order.
• Patients on MAO-inhibitor antidepressants (currently or within the last 14 days).
• Narrow-angle glaucoma.
• Urinary retention or significant prostate enlargement.
• Severe asthma attack — secretions thicken and may worsen breathing.
• Stenosing peptic ulcer or pyloroduodenal obstruction.

Pregnancy: Chlorpheniramine has decades of use and is often considered one of the preferred antihistamines when one is genuinely needed in pregnancy — but "often used" is not "use freely". Take Chlorpheniramine Maleate in pregnancy only after consulting your doctor, at the lowest effective dose for the shortest time, and avoid it near delivery because of possible effects on the newborn.

Breastfeeding: Small amounts pass into breast milk; the drug may make the baby drowsy or irritable and can reduce milk supply, especially with repeated doses or when combined with decongestants. Prefer a non-sedating antihistamine if treatment is needed — ask your doctor. If a dose is taken, watch the baby for sleepiness or poor feeding.

Store Chlorpheniramine Maleate below 30°C in a dry place away from light and moisture; keep syrup bottles tightly closed and never refrigerate unless the label says so. As antihistamine syrups are sweet and attractive to children, be especially careful to keep this medicine locked away out of their reach and sight. Do not use after the expiry date, and return unused expired medicine to a pharmacy for disposal.