At a Glance
| Diphenhydramine | Ketamine | |
|---|---|---|
| Class | Deliriant | Dissociatives |
| Common Dose (oral) | 200–400 mg | 100–300 mg |
| Total Duration | 2.3–7 hrs | 1–2.3 hrs |
| Routes | oral | insufflatedsublingual |
Diphenhydramine, a Deliriant, and Ketamine, a Dissociatives, are frequently compared by users looking to understand their relative effects, dosage profiles, and safety considerations. Diphenhydramine is classified as a Deliriant while Ketamine is a Dissociatives, meaning they approach altered states through different pharmacological mechanisms. They share 43 documented effects in common, with 46 effects unique to Diphenhydramine and 53 unique to Ketamine. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
| Diphenhydramine | Ketamine | |
|---|---|---|
| Class | Deliriant | Dissociatives |
| Common Dose (oral) | 200–400 mg | 100–300 mg |
| Total Duration | 2.3–7 hrs | 1–2.3 hrs |
| Routes | oral | insufflatedsublingual |
| Effects | 89 documented | 96 documented |
| Interaction | Caution | |
| Level | Diphenhydramine | Ketamine |
|---|---|---|
| Threshold | 25 mg | 50 mg |
| Light | 100–200 mg | 50–100 mg |
| Common | 200–400 mg | 100–300 mg |
| Strong | 400–700 mg | 300–450 mg |
| Heavy | 700 mg | 450 mg |
| Level | Dose |
|---|---|
| Threshold | 5 mg |
| Light | 10–30 mg |
| Common | 30–75 mg |
| Strong | 75–150 mg |
| Heavy | 150 mg |
| Level | Dose |
|---|---|
| Threshold | 20 mg |
| Light | 30–75 mg |
| Common | 75–200 mg |
| Strong | 200–350 mg |
| Heavy | 350 mg |
Diphenhydramine
Ketamine
Unpredictable compounding of hallucinogenic effects with anticholinergic delirium