A 38-year-old man repeatedly tries to force his wife to have sex in the middle of the night but has no memory of his actions when he wakes up.
A married woman in her mid-20s often tears off her clothing and masturbates but remembers nothing when her partner rouses her.
For a dozen years, a 31-year-old man masturbates while asleep, at times injuring his groin. Embarrassed due to his unconscious behavior, he avoids relationships for eight years.
These are all clinically documented cases of sleep sex, or sexsomnia, part of a family of sleep disorders called parasomnias that include sleepwalking, sleep talking, sleep eating and sleep terrors.
How much is an overdose?
Went looking for an answer to your question and found this which I did not know was a use for benadryl (well, the active ingredient anyway).
Usual Adult Dose for Insomnia
Diphenhydramine Citrate: 76 mg orally once a day at bedtime
Diphenhydramine Hydrochloride: 50 mg orally once a day at bedtime
https://www.drugs.com/dosage/diphenhydramine.html
A standard dosage for me is an overdose. I have a very low tolerance to Benadryl. Unfortunately, I learned this after that day at the doctor’s office.