- caffeine/alcohol/nicotine
Prescribed medication interrupting night-time sleep
- diuretics – taken after midday
- steroids – taken after midday
- sedative/hypnotic withdrawal
- opioid side-effects
- theophylline, methylphenidate, beta-blockers etc.
Medication causing daytime drowsiness
- night-time sedation
- sedative/hypnotic/anxiolytic drugs
- antihistamines.