Rex Syrup 1mg / ml

About Rex Syrup 1mg / ml

Rex Syrup 1mg / ml Uses

• Seasonal allergic rhinitis with sneezing, runny nose and nasal congestion
• Perennial allergic rhinitis triggered by dust, smoke and pollution common across Pakistani cities
• Chronic urticaria and skin rashes with itching
• Allergic conjunctivitis with watery, itchy eyes
• Itching caused by insect bites or mild allergic skin reactions

Rex Syrup 1mg / ml Benefits

• Provides fast relief from sneezing, itching and watery eyes within an hour
• Once daily dosing makes it easy to use for children and adults
• Causes less drowsiness compared to older first generation antihistamines
• Suitable liquid form for children who cannot swallow tablets
• Affordable option widely available at pharmacies across Pakistan

What Experts Say

Cetirizine works by blocking histamine at H1 receptors in the body. When the immune system reacts to allergens like dust, pollen or pet dander, it releases histamine, which triggers sneezing, itching, swelling and a runny nose. By blocking these receptors, cetirizine reduces these symptoms effectively.

Clinical studies show cetirizine starts working within 20 to 60 minutes and its effect can last up to 24 hours, which supports once daily dosing. It has a lower tendency to cross the blood brain barrier compared to first generation antihistamines, which explains why it causes less sedation for most patients.

Doctors often recommend antihistamines like cetirizine as a first line treatment for allergic conditions because of their proven safety record in both children and adults. However, individual response can vary, and a physician should always guide dosing for young children, pregnant women or patients with kidney impairment.

Drug Class

• Second generation antihistamine (H1 receptor antagonist)

Rex Syrup 1mg / ml formula

• Cetirizine

Available forms

• Syrup

How to use Rex Syrup 1mg / ml?

• Give the exact dose measured with the cup or spoon provided with the pack
• Use once daily, preferably at the same time each day
• Can be taken with or without food
• Follow the age based dosing chart on the pack or as advised by the doctor
• Do not exceed the recommended dose in 24 hours

Drug Interactions

• Sedatives and sleep medicines may increase drowsiness when combined with this syrup
• Alcohol can intensify sedative effects
• Theophylline may slightly reduce clearance of cetirizine from the body
• CNS depressants such as certain antianxiety or antidepressant medicines may add to drowsiness

Risks and warnings

• Caution advised in patients with kidney or liver impairment, dose adjustment may be needed
• Not recommended for children under 2 years without medical advice
• Use with caution during pregnancy and breastfeeding, only under a doctor's guidance
• May cause drowsiness in some people, avoid driving or operating machinery until effect is known
• Avoid alcohol as it can increase drowsiness

Rex Syrup 1mg / ml Side Effects

• Mild drowsiness or tiredness in some patients
• Dry mouth
• Headache
• Stomach upset or nausea
• Dizziness
• Sore throat
• Rare allergic reaction with swelling of face, lips or throat that needs immediate medical attention

Storage Conditions

• Store below 30°C away from direct sunlight
• Keep the bottle tightly closed when not in use
• Shake well before each use
• Keep out of reach and sight of children
• Discard the syrup 3 months after opening or as per the expiry date on the pack