Nodisen (Diphenhydramine Hydrochloride)

Diphenhydramine blocks H1 histamine receptors in peripheral tissues, preventing histamine‑induced swelling, itching, and increased secretions. It also crosses the blood‑brain barrier, antagonizing central H1 receptors, which produces sedation. Its anticholinergic activity further reduces nasal and bronchial secretions.

The appropriate dose of Nodisen is determined by a qualified prescriber based on the patient’s age, condition, and response. Typical adult regimens for allergy relief range from 25 mg to 50 mg every 4–6 hours, not exceeding 300 mg per day, but exact dosing must follow the prescribing information.

Diphenhydramine is classified as pregnancy category B1, indicating that animal studies have not shown risk and there are no adequate human studies. It may be used during pregnancy only if the potential benefit justifies the potential risk. The drug passes into breast milk; nursing mothers should consult their healthcare provider before use.

To place an order, submit an enquiry on the Nodisen product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies, and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including any cold‑chain requirements), and necessary import documentation.

Nodisen is a first‑generation antihistamine, which provides rapid symptom relief but commonly causes sedation and anticholinergic effects. Second‑generation antihistamines (e.g., cetirizine, loratadine) are less sedating but may have a slower onset. Choice depends on the clinical need, such as requiring a sleep‑inducing effect versus daytime alertness.

Store Nodisen at ambient temperature below 25 °C, in its original packaging, protected from moisture and direct sunlight. Keep the product out of reach of children and do not use it after the expiration date printed on the label.

Nodisen is taken orally with a full glass of water. It may be taken with or without food, although taking it with food can reduce mild stomach upset. Swallow tablets whole; do not crush or chew unless the formulation specifically permits it.

Serious adverse reactions, although rare, include cardiac arrhythmias and severe allergic responses such as anaphylaxis. Patients should seek immediate medical attention if they experience rapid heartbeat, chest pain, difficulty breathing, swelling of the face or throat, or a rash that spreads quickly.

Nodisen should be avoided in individuals with known hypersensitivity to diphenhydramine or any excipients, in patients with narrow‑angle glaucoma, severe urinary retention, or uncontrolled asthma. It is also contraindicated in newborns and infants under six months of age.