1 https://www.nhs.uk/live-well/sleep-and-tiredness/why-lack-of-sleep-is-bad-for-your-health/
Nytol One-A-Night (P) contains diphenhydramine hydrochloride. An aid to the relief of temporary sleep disturbance. Adults and children 16 years and over: 1 tablet taken 20 minutes before bed. Children under 16 years: Not recommended. Do not use for more than 2 weeks without medical advice. Avoid concomitant use of alcohol or other antihistamine-containing preparations. Do not drive or operate machines. Contraindications: Stenosing peptic ulcer, pyloroduodenal obstruction, known hypersensitivity to ingredients. Caution: The elderly, pregnancy/lactation, myasthenia gravis, epilepsy or seizure disorders, narrow-angle glaucoma, prostatic hypertrophy, urinary retention, asthma, bronchitis and COPD, moderate to severe renal or hepatic impairment, intolerance to some sugars. Interaction with CNS depressants (including alcohol), monoamine-oxidase inhibitors, anticholinergic drugs (e.g. atropine, tricyclic depressants), metoprolol, venlafaxine. Side effects: Fatigue, hypersensitivity reactions, confusion, paradoxical excitation, sedation, drowsiness, dizziness, dry mouth, GI disturbances, muscle twitching, headache, blurred vision, tachycardia, palpitations, convulsions. PL 02855/0070. MAH: Omega Pharma Limited, 32 Vauxhall Bridge Road, London SW1V 2SA. RRP (ex. VAT): 20s £6.29
SPC: https://www.medicines.org.uk/emc/medicine/19778