Nytol One-A-Night (Diphenhydramine Hydrochloride)

Diphenhydramine Hydrochloride, the active ingredient in Nytol One‑Night, is a first‑generation antihistamine presented as an oral tablet for systemic use. It is employed as an over‑the‑counter sleep aid for the short‑term treatment of occasional insomnia in adults.

GNH USA supplies Nytol One‑Night as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, ensuring quality and regulatory conformity across global markets. The company leverages validated manufacturing processes and robust logistics to meet the needs of diverse healthcare providers.

Diphenhydramine Hydrochloride, a first‑generation antihistamine, is used for sleep‑related indications by blocking histamine activity. - Occasional insomnia: helps initiate and maintain sleep for short periods. - Sleep onset difficulty: reduces the time needed to fall asleep. - Nighttime restlessness: promotes a calmer sleep environment.

Adverse reactions may occur with diphenhydramine use.

Common Side Effects: - Drowsiness: excessive sleepiness during the day. - Dry mouth: reduced salivation leading to discomfort. - Blurred vision: temporary visual disturbances. - Constipation: slowed gastrointestinal motility. - Urinary retention: difficulty emptying the bladder. - Dizziness: sensation of light‑headedness.

Serious or Rare Side Effects: - Allergic reactions: rash, itching, or angioedema. - Tachycardia: rapid heart rate. - Confusion or hallucinations: altered mental status. - Severe constipation or bowel obstruction. - Seizures: rare neurologic events. - Respiratory depression: marked breathing difficulty.

Safety considerations should be observed when using diphenhydramine tablets. - Operating machinery: avoid driving or using heavy equipment due to sedation. - Alcohol consumption: do not combine with alcohol as it enhances CNS depression. - Elderly patients: use with caution because anticholinergic effects are more pronounced. - Glaucoma: avoid if you have narrow‑angle glaucoma as anticholinergic action may worsen it. - Pregnancy and breastfeeding: safety has not been established; consult a healthcare professional. - Store at ambient temperature: keep in the original pack, protect from moisture and heat.

Diphenhydramine may interact with other medicines.

Major Interactions (Avoid): - Alcohol: additive sedation and respiratory depression. - Monoamine oxidase inhibitors (MAOIs): risk of severe CNS depression. - CNS depressants (benzodiazepines, opioids): heightened sedation.

Moderate Interactions (Monitor Closely):\n- Anticholinergic drugs (e.g., atropine): increased anticholinergic load. - Tricyclic antidepressants: additive anticholinergic effects. - CYP2D6 inhibitors: may raise diphenhydramine plasma concentrations.