- Antihistamines... aren't addictive, and are usually found in OTC sleep remedies (Tylenol PM, Unisom, etc.), but can also be purchased on their own (Benedryl, chlortrimatron, etc.), or in allergy or cold med combos. It's generally best to avoid the combo meds, and stick with single ingredients. NyQuil pioneered combo meds ((I still have a VHS from the 80s with a NyQuil ad on it! Lol "You used to have to take all these medicines, but just 2 NyQuil contains the same medication, with only 1 dose!")). Be very careful/read active ingredients on both single and combo meds, so you don't end up taking the same medication in 3 different forms. Diphenhydramine is Diphenhydramine, whether it's in Benadryl, NyQuil, TylenolAllergy, UnisomMini, Sleep Promoting Teas, etc.
Stronger & different antihistamines are available by Rx.
Note : While most people get drowsy or knocked out on antihistamines? For every medication, the opposite side effect exists. Aka antihistamines make some people very hyper, instead of very drowsy. Also, some people will react one way on one antihistamine, but the opposite on another.
- Prazoin... Isn't addictive. It's a blood pressure medication, mode of action unknown (although it may work as an alpha-adrenoceptor blocker). Causes drowsiness, and has a weird side effect of reducing/eliminating nightmares &/or dreams altogether. This is the only med I know of that does that (instead of the far more common: causes vivid dreams), that isn't an anesthetic or date rape drug.
Note : Same as above. For some people prazoin will cause hyperactivity & vivid nightmares or vivid dreams, instead of drowsiness & no nightmares &/or dreaming.
- Melatonin... Is a hormone supplement. People who are sensitive to hormones should be very careful. While commonly used as a sleep aid, it can also cause wild mood swings & other hormonal imbalance issues in some people (from hallucinations to suicidal ideation, weight gain/loss, paranoia, missed or extra periods, etc.) in addition to the hyperactivity & insomnia all sleep aids can cause instead.
- Dietary... Most commonly, L-Tryptophan (what's in turkey & warm milk), but there are other herbs which have chemicals in them which can cause drowsiness (or hyperactivity & insomnia). Just like checking active ingredients on OTC meds? Check active ingredients in herb names, as well as other side effects. Some which are great for sleep, and perfectly fine otherwise, can cause miscarriage, for example... Or react very very strongly with OTC or Rx meds. Either never-mix-these-two-substances, or by doubling the dose! (Llike taking digitalis, and drinking foxglove tea will kill you... Because the active ingredient in foxglove is... Digitalis. That's where we get digitalis from!)
Natural doesn't mean safe... Natural means it's chemical content unregulated and impure. Whether it's basically harmless (like turkey & milk), or FFS there is belladonna (aka Deadly Nightshade, which contains a very deadly neurotoxin, that produces feelings of euphoria & numbness as it paralyzes the central nervous system) in Hylands teething tablets. Ahem. There have been times where I have been unable to see the dentist I've calculated for my weight and been High as f*ck on Hylands. Yeah. There's a damn good reason why babies like it. Just like they like whiskey & sugar on their gums, or a bottle of sugared wine? That'll fix a colicky baby being unable to sleep :rolleyes: So if you're looking into natural remedies? Prepare for research!!! Some stuff is fantastic. Others? Less so.
- Everything else that I know of that is used specifically for sleep? Is either addictive, or well known for causing vivid dreams/nightmares, or both.