Numark Antihistamine & Allergy Relief 4mg Tablets contain chlorphenamine maleate 4 mg, a sedating antihistamine used to relieve the symptoms of allergic conditions.

They can be used for hay fever affecting the nose and upper airways, allergic reactions to medicines, nettle rash, local itching, severe skin rash with swelling, food allergies and reactions to insect bites. Chlorphenamine reduces the effects of histamine released during an allergic reaction.

Adults and children aged 12 years and over can take one tablet every 4 to 6 hours as required, up to a maximum of 6 tablets in 24 hours. Children aged 6 to 12 years can take half a tablet every 4 to 6 hours, subject to the stated daily maximum.

This medicine can cause drowsiness. A pharmacist may provide advice about its appropriate use where required.

Patient Information Leaflet

Ingredients

Main ingredients: Chlorphenamine maleate 4 mg per tablet. Excipients: Lactose, maize starch, magnesium stearate, pregelatinised starch, quinoline yellow lake (E104), stearic acid.

Usage and Instructions

Numark Antihistamine & Allergy Relief 4mg Tablets are used to relieve the symptoms of allergic conditions responsive to antihistamines, including hay fever, nettle rash, local itching, allergic reactions to medicines, food allergies and insect bites.

Adults and children aged 12 years and over: Take 1 tablet every 4 to 6 hours.

Maximum daily dose: 6 tablets, equivalent to 24 mg chlorphenamine maleate, in any 24-hour period.

Children aged 6 to 12 years: Take half a tablet every 4 to 6 hours. Do not give more than 6 half tablets, equivalent to 12 mg, in any 24-hour period.

Children under 6 years: Do not give this medicine unless advised by a doctor.

Leave at least 4 hours between doses and do not exceed the stated dose or frequency.

For oral use. Take the tablets with water.

Do not use continuously for more than 2 weeks without consulting a doctor.

Older people may be more likely to experience side effects and may require a lower dose. Speak to a doctor or pharmacist before use.

If you forget a dose, take it when you remember unless it is almost time for the next dose. In that case, skip the missed dose and continue with the usual dosing schedule. Do not take a double dose.

Warnings

Do not take Numark Antihistamine & Allergy Relief 4mg Tablets if you:

Are allergic to chlorphenamine, other antihistamines or any of the other ingredients.
Have taken a monoamine oxidase inhibitor (MAOI) for depression within the last 14 days.

Speak to a doctor before taking this medicine if you have epilepsy, raised pressure in the eye or glaucoma, high blood pressure, heart disease, liver disease, kidney problems, bronchitis, bronchiectasis, asthma, an overactive thyroid, an enlarged prostate, difficulty passing urine, an intestinal obstruction or porphyria.

Children and older people may be more susceptible to effects such as drowsiness, dizziness, blurred vision, lack of coordination, confusion, excitation, restlessness or nervousness.

Tell a doctor or pharmacist if you take other medicines. Particular care is required with other antihistamines, including cough and cold medicines containing antihistamines, medicines that cause sedation, medicines for mental health conditions, medicines with antimuscarinic effects, medicines for high blood pressure and anti-epileptic medicines such as phenytoin.

Do not use with other antihistamine-containing products.

Alcohol: Do not drink alcohol while taking this medicine. Alcohol can increase the drowsiness caused by chlorphenamine.

Pregnancy and breastfeeding: Speak to your doctor before taking this medicine if you are pregnant or breastfeeding. The leaflet states that it should not be taken during pregnancy or breastfeeding unless your doctor considers it essential.

Driving and using machinery: This medicine may cause drowsiness, blurred vision and lack of coordination. Do not drive or operate machinery if affected.

This medicine contains lactose. If you have been told that you have an intolerance to some sugars, contact your doctor before taking it.

Stop taking the tablets immediately and contact a doctor if you develop signs of an allergic reaction, including an itchy or raised rash, peeling or blistering skin, swelling of the face, mouth or throat, difficulty breathing, wheezing or shortness of breath.

Overdose: If you take too many tablets, contact a doctor immediately or go to the nearest hospital emergency department. Take the remaining tablets and the medicine pack with you.

Side Effects

Frequency	Side effects	Advice
Very common	Drowsiness, which may cause you to fall asleep.	Do not drive or operate machinery if affected.
Common	Dizziness, abnormal coordination, blurred vision, difficulty concentrating, nausea, headache, dry mouth and fatigue.	Speak to a doctor or pharmacist if troublesome or persistent.
Frequency not stated	Blood disorders, difficulty or pain passing urine, urinary retention, irregular heartbeat, low blood pressure, chest tightness, double vision, tremor, muscle twitching or weakness, depression, irritability, confusion, loss of appetite, vomiting, stomach pain or upset, indigestion, constipation, diarrhoea, unusual excitement, tingling or weakness of the hands, difficulty sleeping, nightmares, ringing in the ears, dry nose or throat, thickened bronchial secretions and nervousness.	Seek medical advice if these effects are significant, persistent or concerning.
Frequency not stated	Yellowing of the skin or whites of the eyes associated with liver or blood problems.	Seek medical advice promptly.
Serious side effects requiring urgent medical attention	Itchy or raised rash, peeling or blistering skin, swelling of the face, mouth or throat, difficulty breathing, wheezing or shortness of breath.	Stop taking the tablets immediately and contact a doctor.