They may interfere with coordination and cloud your concentration.
Many sedating antihistamines do not require a doctor's prescription.
Sedative-hypnotics include nonbenzodiazepine receptor agonists (zaleplon, zolpidem, eszopiclone); short-acting benzodiazepine receptor agonists (triazolam); intermediate-acting benzodiazepine receptor agonists (estazolam, temazepam); and selective melatonin agonists (ramelteon).
Both eszopiclone and sustained-release zolpidem are effective for both sleep-onset and sleep-maintenance insomnia, with a reduced abuse potential and long-term efficacy of up to 6 months as compared with nonselective benzodiazepine receptor agonists.
Melatonin does not appear to have obvious side effects other than sedation.
Currently, ramelteon is the only melatonin receptor agonist approved by the FDA for treatment of insomnia and is available by prescription.
A sedative-hypnotic of the imidazopyridine class, zolpidem has a rapid onset and short duration of action.