What do the Clean, Low, Watch and Swap levels mean?

They are cut from a continuous concern level the app computes from the sourced claims that the chosen evidence lens shows: each claim counts its concern class, tier weight, confidence and dose relevance, combined worst-first with a decay so one serious finding outweighs many small ones, then scaled by how much of the substance reaches you in this use. Clean is below 0.35, Low below 1.1, Watch below 2.0 and Swap above that, on a 0 to 3 scale.

Is Diphenhydramine Hydrochloride safe in food and drink?

Q: Is diphenhydramine hydrochloride safe in food and drink?

Under the app's default Cautious lens, diphenhydramine hydrochloride in food and drink rates Watch: worth watching; the app would list a cleaner alternative type. 3 sourced concerns count (intake guideline, consensus tier; suspected carcinogen, emerging tier; metabolic, emerging tier). This is research with sources, not medical advice.

Medicines & supplements1 use researched3 sourced claims

Where it turns up: common antihistamine, sleep aid active. Detox My Life researched diphenhydramine hydrochloride under one use, because the same substance means something different in each use. Every claim below carries its evidence tier, how sure the research is that it applies here, and the sources it cites. The level is computed by the app's own deterministic engine, so the page says exactly what the app would.

Level by use and lens

Use	Mainstream	Cautious (default)	Based	Concerns · favour · fringe
Eaten or drunk	Low	Watch	Watch	3 · 0

Mainstream shows consensus claims only; Cautious adds emerging research; Based adds fringe claims, labelled as such. The last column counts, under Cautious, the sourced concerns, the findings in its favour and the fringe claims Based would add.

Safer swaps: the app's swap catalog has no entry tied to this ingredient yet. When you scan a product that contains it, the app suggests cleaner alternative types for that product; the swap categories list what the catalog covers today.

Eaten or drunk Watch

Under the default Cautious lens diphenhydramine hydrochloride in food and drink rates Watch: worth watching; the app would list a cleaner alternative type. Mainstream (consensus only) rates it Low; Based (adds the fringe) rates it Watch. Researched 2026-09-03.

Sourced concerns (3)

ConsensusIntake guidelineconfidence 100%

Ingestion of higher than recommended doses of diphenhydramine hydrochloride can lead to serious heart problems, seizures, coma, or even death.

Why here: This concern directly relates to the effects observed in individuals who ingest excessive amounts of the substance.
What would have to be true: Oral ingestion exceeding recommended therapeutic doses, with serious effects reported at ingestions greater than 1 gram, increased risk above 1.5 grams, and fatal doses reported over 20 mg/kg.

Sources the engine cites:

FDA warns about serious problems with high doses of the allergy medicine diphenhydramine (Benadryl) — fda.gov (2020) · regulator or public body
Diphenhydramine overdose: MedlinePlus Medical Encyclopedia — medlineplus.gov (2025) · regulator or public body
FDA warns about serious problems with high doses of the allergy medicine diphenhydramine (Benadryl) — fda.gov (2020) · regulator or public body
1 community or commercial page, not counted here.

EmergingSuspected carcinogenconfidence 70%

There was equivocal evidence of carcinogenic activity of diphenhydramine hydrochloride in male and female F344/N rats in 2-year feed studies, based on marginally increased incidences of uncommon brain neoplasms and pituitary gland adenomas.

Why here: This finding is from animal feed studies, directly relevant to ingestion, though the evidence is not conclusive for humans.
What would have to be true: Dietary exposure in F344/N rats over a 2-year period.
The other side: No evidence of carcinogenic activity was found in male or female B6C3F1 mice in the same studies. Regulatory bodies like IARC, ACGIH, NTP, or EPA do not classify diphenhydramine hydrochloride as a probable, possible, or confirmed human carcinogen at levels greater than or equal to 0.1%.

Sources the engine cites:

NTP Toxicology and Carcinogenesis Studies of Diphenhydramine Hydrochloride (CAS No. 147-24-0) in F344/N Rats and B6C3F1 Mice (Feed Studies) - PubMed — nih.gov (1989) · regulator or public body

EmergingMetabolicconfidence 80%

Long-term ingestion of diphenhydramine hydrochloride is associated with an increased risk of dementia in older adults.

Why here: This claim pertains to the potential long-term neurological effects resulting from chronic oral administration of the substance.
What would have to be true: Chronic, regular oral ingestion, particularly in geriatric populations.
The other side: Observational studies identify associations, not direct cause and effect, and more research is needed to establish a definitive causal link.

Sources the engine cites:

Long-term use of diphenhydramine - PMC - NIH — nih.gov (2015) · regulator or public body
2 web articles (texashealth.org, goodrx.com), linked in the app.

Not researched here

The engine has no dossier for diphenhydramine hydrochloride when cooked with heat, in cold food, as a finishing ingredient, in heated food packaging or other uses. The app researches an ingredient for the use it infers from your product, so a scan fills these in; this page only shows what has already been researched and source-verified.

This is research, not medical advice. Detox My Life shows sourced claims sorted by evidence tier. It does not diagnose, treat, or tell you to start or stop anything. Talk to a qualified professional about your health.

Scan your own. The app reads any product label with your camera, works out how you are about to use it, and researches every ingredient for that use with live sources. Every scan adds to a Detox Score for your home, where 50 is a typical home in your region, and a plan of next swaps.

Download on the App Store Get it on Google Play