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OTC antihistamines are safe for occasional use (not long-term). Melatonin has fewer side effects.
OTC antihistamines: 2-3 nights maximum due to tolerance and side effects. See GP if insomnia persists >4 weeks.
Melatonin is gentler with fewer next-day effects. Antihistamines work faster but may cause drowsiness.
Yes—sleep hygiene (routine, dark room, no screens) is most effective long-term.
If insomnia persists >4 weeks, affects daily function, or you suspect sleep apnea.
Last reviewed: November 2025
Reviewer: Healthcare Content Team
This information is for educational purposes only and does not replace professional medical advice. Always consult a healthcare provider for diagnosis and treatment.