So, this was a long time ago, but I thought since I discovered this subreddit I might as well post it here. I would NEVER suggest doing Benadryl or any DPH, it was one of the worst experiences of my life. So for reasons I won’t discuss here, I ended up taking 30 25mg Benadryl.
Diphenhydramine
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 6 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- PubChem toxicity data
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 6 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- PubChem toxicity data
Aliases: Dph, Nytol, Sominex, Zzzquil, Benylin, benadryl
Summary
Diphenhydramine (also known as DPH, Dimedrol, Benadryl, and many others) is a deliriant substance of the ethanolamine class. It is a first-generation H1 antihistamine that is widely used as a generic, over-the-counter medication to treat allergies. When exceeding approved doses, diphenhydramine produces powerful deliriant effects.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral BA 40-60% | 100-200mg | 200-400mg | 400-700mg | 700mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 30-90 min | 30-90 min | 1-4 hrs | 2-6 hrs | 6-8 hrs |
Effect Profile
444 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 363 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Psychedelic
7.0
Strong+
7/10
Strong visuals, auditory effects, and body load with mild headspace
Visual Intensity
×3
10
external hallucinations
internal hallucinations
autonomous entities
drifting
after images
Headspace Depth
×3
5
perspective alterations
confusion
time distortion
Auditory Effects
×1
10
auditory hallucinations
auditory hallucination
auditory suppression
Body Load / Somatic Effects
×1
9
nausea
muscle spasms
increased heart rate
Tolerance
Build-up
develops within days of regular use; anticholinergic tolerance distinct from antihistamine tolerance
Reset
3–7 days for acute tolerance
Tolerance Decay
Full tolerance
1d
Half tolerance
10d
Baseline
~18d
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Cross-Tolerances
Doxylamine
30%
Hydroxyzine
30%
Effects
Aggregated from 363 Erowid and 81 Bluelight experience reports
Positive Effects 28
Sedation
46.5%
90%
Anxiety Suppression
46.2%
84%
Stimulation
33.9%
70%
Vivid Dreams
30.0%
86%
Music Enhancement
23.2%
88%
Euphoria
20.6%
83%
Color Enhancement
19.9%
79%
Focus Enhancement
19.6%
70%
Empathy
15.7%
70%
Contentment
12.0%
76%
Awe
10.0%
70%
Drowsiness
6.0%
85%
Geometric Imagery
4.0%
85%
Warping
4.0%
80%
Lightness
4.0%
80%
Emotional Openness
4.0%
68%
Creativity Enhancement
2.2%
70%
Muscle Relaxation
2.0%
75%
Hypersomnia
2.0%
80%
Perceived Size Change
2.0%
85%
Adverse Effects 90
Entity Imagery
62.0%
87%
Heaviness
46.0%
87%
Body Load
42.0%
82%
Fear
40.0%
89%
Auditory Effects
35.8%
86%
Visual Distortions
34.1%
89%
Confusion
32.5%
89%
Open-Eye Visuals
31.4%
86%
Thought Disorganization
30.0%
84%
Ataxia
30.0%
86%
Dry Mouth
30.0%
83%
Memory Suppression
24.5%
89%
Depersonalization
24.0%
78%
Amnesia
24.0%
88%
Nausea
21.8%
84%
Panic
20.0%
88%
Motor Impairment
18.4%
86%
Tremor
18.0%
83%
Frequent Urination
16.0%
81%
Dissociation
14.3%
85%
Combinations
Cross-Check Diphenhydramine with another substanceTrip Reports
Community Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance.
Reddit 8 reports 4 neutral 4 cautionary visit
looking back this was embarrassing as fuck but i was spazzing out in my chair from restless legs and for some reason i thought i dropped my airpods case and was looking for them for a good 15 minutes like looking under my table and looking under my backpack then trying to look un...
Idek what to say tbh, I’ve struggled with DPH abuse for a few years along with other substances. I stopped doing any DPH about half a year ago when I took 5,000mg and ended up in a coma in the ICU.
Came across this sub and figured I’d share my experience. This happened about 8 years ago. Me and my girlfriend at the time were broke, bored, and not having the best time together at that point.
EDIT: i just realized this will likely fall under the glorifying part and i really do not intend this to be that case. I just want to find people who relate.
Im (1) (3) when I was 12 I took 45 pills of benadryl and I almost died i was having a seizure and my mom rushed me to the hospital. I still have some hppd symptoms to this day and that was over a year ago.
last year i was court ordered to a year of rehab after i caught a fent charge. WORST time of my life like ever, I started abusing dph because it was all i could access. i used huge amounts multiple times everyday, near the end i was taking multiple grams a day.
I'm only 17 and i dont know what im going to do with my life but every time i do dxm and dph i feel my brain phsyically melting as well as my internal organs deteriorating. Im not even suicidal anymore i just love dxm and dph. I steal so much dxm and dph and I can't stop.
Erowid 8 reports 3 positive 3 neutral 2 cautionary visit
I have been doing this drug on and off for around 3 years for allergies. I never experienced any vivid hallucination up till now, but I have never exceeded 350mg until recently. I have a couple experiences, but I will put them all in one report. For the first one, I will title it: Incredible, until...
I have ALOT of experience with dryl. When I first started taking it I was afraid of it, kinda, I just wasnt real big on intentionally overdosing on something to get stoned. so I would take like 4 of them and feel kinda stoned.
Before summer of 2003, I started to experiment with drugs. I had been smoking cigarettes since I was 8, and at this time I was 13. I started with weed and then I progressed to harder drugs. I had just heard about DXM in september 03.
Previous drug experience: Marijuana (regular for ~3 years), alcohol (same as pot), prescription pills occasionally (Xanax, Klonopins, Oxys, etc in combination with pot/alc), cocaine (3-4 times in the last 8 months w/ pot), inhaled airduster a few times, and did nyquil / triple c's once before I knew what I do now about...
The Effects: The first time I took Benadryl, it gave me this weird feeling of familiarity, like I've experienced a high like it before, but to this day I can't quite place it. It's sort of like alcohol, in it's downer effects, but more like weed, in its mentally disabling effects.
11:10 PM, two handfuls, 750mg worth of benadryl down the hatch. I consider myself an 'experienced tripper', I've done lsd, lsa, shrooms, dmt, dxm, and dph. My highest dph dose was 1200 (a story much harder to put into words).
[Erowid Note: The doses described in this report are potentially life threatening. The amount taken is beyond a heavy dose and could pose serious health risks or result in unwanted, extreme effects. Doses such as this have been known to cause hospitalizations and/or deaths.
[Erowid Note: The doses described in this report are potentially life threatening. The amount taken is beyond a heavy dose and could pose serious health risks or result in unwanted, extreme effects. Doses such as this have been known to cause hospitalizations and/or deaths.
Bluelight 8 threads 1 positive 5 neutral 2 cautionary visit
This was one of my weirdest DPH trips I think I've ever had, but it was still mildly enjoyable for some reason. After being a year sober from DPH, I decided to try it again.
UPDATE: I now go by the username Enigma and you may find a video report of this story here: https://www.youtube.com/watch?v=IzXPgUTVLg0&lc=z23ajbcrkqauspqik04t1aokgqfpx1zmty4qwqul2lcprk0h00410 Preface: edit: I mistakenly said I took 800mg in this report when I actually took 1000mg (this being what a full packet of Nyto...
Hi everybody a while ago I did 500mg of Diphenhydramine with a friend. Before I did this though I had done a 375mg dose that was pretty funny and nothing really went wrong. My hallucinations were quite mild such as seeing people where they werent, but 500mg defintley threw me over the edge.
I did Diphenhydramine 2 days in a row Spoiler: First day Halo, Roaches, Rats, colors, scorpions, Patterns, and Sounds... What A night 13/June/11 Age 15 Hearing a lot of bizarre stories about the hallucinogenic effects of Diphenhydramine, I decided to experiment with this. Here is what happened when I did.
Once again, I was craving a trip to hell. Here I am, at Wal-Mart. A place that has everything. Be it bicycles or pharmaceuticals to trip off, they fuckin have it. I went to the cough medicine isle. Maybe a night with dex is in order. I searched for maximum strength. But no, wait.
In the following I would like to show you an old trip report I wrote at the age of 15. As you can see from my approach and possibly the writing style, I was quite inexperienced with drugs at the time and therefore still had difficulties procuring them, but still had the desire for “weirdness”.
3-Day Diphenhydramine Binge 3 days ago, I embarked on a nightly 3-day journey/exploration of Diphenhydramine. I tried to take notes and write trip reports for the first two trips, but for the third one I’m just pulling from memory, which may or may not be factually accurate. I tend to think it is, though.
Diphenhydramine Hydrochloride (001) I have decided that now is the time to begin typing my recent and soon to come experiences with Diphenhydramine Hydrochloride. These will simply be trip reports; so do not attempt to argue, call me an idiot for using the drug, etc. Keep that to yourselves.
Pill Identifiers
25
known pill identifiers on record — view imprints, colors, shapes, and images
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Helpful Links
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