In addition to medicines that are prescribed to cause drowsiness (like sleeping pills), the following medicines often cause drowsiness as a side effect:
Diphenhydramine (Benadryl)
Doxylamine (NyQuil)
Chlorphenamine (ChlorTimetron)
Brompheniramine (Bromfed, Dimetapp)
Hydroxyzine (Vistaril, Atarax)
Meclizine (Antivert)
Alprazolam (Xanax)
Clonazepam (Klonopin)
Diazepam (Valium)
Lorazepam (Ativan)
Temazepam (Restoril)
Haloperidol (Haldol)
Olanzapine (Zyprexa)
Prochlorperazine (Compazine)
Promethazine (Phenergan)
Gabapentin (Neurontin)
Pregabalin (Lyrica)
Amitriptyline (Elavil, Vanatrip)
Nortriptyline (Pamelor)
Doxepin (Silenor, Sinequan)
Mirtazapine (Remeron)
Atenolol (Tenormin)
Metoprolol (Lopressor, Toprol XL)
Propranolol (Inderal)
