Dimetindene

Uses	Allergic reactions
Therapy	Anti-Allergic
Side Effects	Drowsiness, excitement, headache, nausea, dry mouth, vomiting, swelling, fatigue, restlessness

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Molecule Description

Dimetindene belongs to the group of medicines known as antihistaminic medicines (antiallergic medicines). This medicine is used for the treatment of allergic symptoms like itchy, red skin lesions, a runny nose, watering from the eyes and sneezing. It improves allergic rhinitis, food and medicinal allergies. Do not take this medicine if you are having glaucoma (increased eye pressure), facing difficulty in passing urine and are pregnant or breastfeeding. Inform your doctor if you are taking any other medicines. Contact your doctor immediately if you think you have taken a higher dose than that required or if you are experiencing any other symptoms.

Uses

This medicine is used for the treatment of different allergic conditions. It improves allergic symptoms like skin redness, itching, a runny nose, watering from the eyes and sneezing.

Contraindications

When should one not use Dimetindene

If you are having a history of hypersensitivity (severe skin rashes, swelling of eyes, lips, difficulty in breathing and swallowing) to Dimetindene or any of the contents of the medicine.

Side effects

Common side effects of this drug are:

Drowsiness
Excitement
Headache
Nausea
Dry mouth
Vomiting
Swelling
Fatigue
Restlessness

Precautions and Warnings

Pregnancy

This medicine may affect your developing baby, so do not take this medicine without consulting your doctor. Please inform your doctor if you are planning for pregnancy or happen to conceive during the treatment.

Breast Feeding

This medicine may pass into the breastmilk and adversely affect the baby, so do not take this medicine without a doctor's advice if you are breastfeeding your baby.

Driving

This medicine may produce drowsiness and affect alertness; thus, it is advisable not to get involved in any activity which requires alertness like driving or operating heavy machinery.

Alcohol

No, it increases the chances of drowsiness so it is advisable not to take this medicine with alcohol.

Other General Warnings

Talk to your doctor if

You have increased pressure in your eyes (Glaucoma).
You have difficulty in passing urine, any problems related to urination.
You have a lung disease like a chronic obstructive pulmonary disease.
You experience fits.
This medicine may produce excitement in young children.
Be cautious while giving this medicine to children below the age of 1 year.

Mode of Action

How Does It Work?

Some natural substances (Histamine) released in our body are responsible for allergic symptoms like sneezing or a runny nose, skin redness, itching and watering from the eyes. Dimetindene blocks the effect of these substances and provides relief in the symptoms of allergy. It also decreases the swelling and itching associated with allergy.

Interactions

Interactions with other medicines

Some medicines may affect the way Dimetindene works or even Dimetindene can affect the working of some medicines.
Tell your doctor if you are taking, have recently taken or might take any other medicines, including:
Central nervous system depressant medicines like Tranquillizers, Hypnotic medicines, alcohol (as they slow down the reflexes), monoamine oxidase (MAO) inhibitors, medicines for mental illness like Tricyclic antidepressants, anticholinergic and antihistaminic medicines (they increase the chances of urine outflow problems), medicines to relieve abdominal cramps, medicines to dilate pupil, medicines for urine problems.
Strong painkillers (opioids), medicines to stop vomiting, medicines to treat motion sickness, cancer.
Tell your doctor about any of the other medicines you are taking which includes medicines without prescription and herbal medicines as well, as these medicines may alter the effectiveness of Dimetindene or increase the chances of side effects.

Dosage

Overdose

If you think you have taken too much of this medicine, contact your doctor immediately or visit the nearest hospital.

Missed a Dose

If you have missed taking any dose of this medicine, take it as soon as you remember. If it's time for your next dose, then skip the missed dose and continue with your regular dosing schedule. Do not take a double dose of this medicine to compensate for the missed one.

Frequently Asked Questions (FAQs)

This medicine is used for the treatment of different allergic conditions. It improves allergic symptoms like skin redness, itching, a runny nose, watering from the eyes and sneezing. This medicine is useful in conditions like allergic rhinitis (irritation and inflammation of the mucous membrane of the nose), allergies due to medicines and food, various itchy skin rashes and insect bites.

Dimetindene is a medicine belonging to the group known as antihistaminic medicines. Dimetindene blocks the effect of certain chemical substances which are responsible for producing allergic symptoms. It also decreases the swelling and itching associated with an allergy.

Drowsiness, excitement, headache, nausea, a dry mouth, vomiting, oedema (swelling), fatigue, restlessness are some of the common side effects that you may experience on taking this medicine.

Do not use this medicine if you are having a history of hypersensitivity to any of the contents of the medicine, Post-natal period (time immediately after childbirth) up to one month, glaucoma (increased pressure in the eyes), pregnancy and in infants below 1 month of age.

Taking other anti-allergic medicines along with Dimetindene, increase the chances of side effects and may produce symptoms of an overdose which can be fatal. So, it is always advisable to inform your doctor beforehand if you are taking any other medicines along with Dimetindene.

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References:

Dimethindene [Internet]. Pubchem.ncbi.nlm.nih.gov. 2021 [cited 11 June 2026]

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