Is promethazine stronger than diphenhydramine?
I be just wondering if Promethazine (Sominex) is a stronger sleep medication than Diphenhydramine (Nytol/Benadryl)?
Answer: 150 mg of benadry will put a ~ horse down.
Mg for mg, Promethazine is a bit stronger.
Promazine (phenergan) is quite a bit stronger.
Chlorpromazine (thorazine) is even stronger..
i never get sleepy when i took promethazine but 150mg of diphenhydramine wil put me down