Pheniramine

Antihistamine (older type)
PRESCRIPTION ONLY IN INDIA

Pheniramine is a antihistamine (older type) found in 2 medicines sold in India, such as Avil 25, Avil Injection. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.

Also called: pheniramine maleate

What it is used for

Treats allergic reactions, itching and hives.

How it works

An older sedating antihistamine, often given by injection for allergic reactions or used in eye drops and syrups.

How to take it

Tablets usually 22.5 to 45 mg up to three times a day. Do not drive if drowsy.

Common side effects

  • Drowsiness
  • Dry mouth
  • Blurred vision
  • Constipation

Get medical help straight away if

  • Confusion or fast heartbeat
  • Inability to pass urine

Be careful

Causes drowsiness; avoid driving and alcohol.

Other medicines and interactions

Stronger drowsiness with alcohol, opioids and sedatives.

Pregnancy and breastfeeding

Ask a doctor before using in pregnancy; avoid while breastfeeding if possible.

Brands of Pheniramine (2)

Avil 25Avil Injection

Common questions

What is Pheniramine used for?

Treats allergic reactions, itching and hives.

How does Pheniramine work?

An older sedating antihistamine, often given by injection for allergic reactions or used in eye drops and syrups.

How should I take Pheniramine?

Tablets usually 22.5 to 45 mg up to three times a day. Do not drive if drowsy.

What are the side effects of Pheniramine?

Common: Drowsiness, dry mouth, blurred vision, constipation. Get help straight away for: Confusion or fast heartbeat, inability to pass urine.

Does Pheniramine interact with other medicines?

Stronger drowsiness with alcohol, opioids and sedatives.

Is Pheniramine safe in pregnancy and breastfeeding?

Ask a doctor before using in pregnancy; avoid while breastfeeding if possible.

Does Pheniramine need a prescription in India?

Yes. In India it is a prescription (Schedule H) medicine, so a pharmacist should sell it only with a doctor's prescription.

Which brands contain Pheniramine?

Avil 25, Avil Injection.

Sources and further reading

NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.

Last reviewed 31 October 2026. Written by Satya Babu from standard prescribing information.

🔎 Search another medicine

For information only, not medical advice. This page is a plain-language summary written from standard prescribing information and the public guides linked below. Brands sometimes change their formula, so always check the composition printed on the pack. Doses here are typical adult doses; yours may differ. Do not start, stop or change a medicine without your doctor or pharmacist, and keep all medicines away from children. In an emergency, call 112 (India) or your local emergency number.