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    Diphenhydramine

    Aliases: diphenhydramine, dph, benadryl

    Categories

    depressant deliriant common
    diphenhydramine structure

    Summary

    An antihistamine which, when taken in smaller doses relieves allergies and insomnia. In larger doses works as a deliriant and can actually keep the user awake. Generally the 'high' of this drug is reported as dysphoric, potentially causing hallucinations indistinguishable from reality.

    ⚠️ AVOID: Many oral diphenhydramine preparations contain analgesics such as acetaminophen/paracetamol or aspirin, which can be toxic to the liver in high doses.
    ⚠️ The doses provided are for recreational usage. For use as a sleep aid the dose ranges from 25-75mg, or as specified on the product packaging. For medical allergy use doses tend to range from 25-50mg, or as specified on the product packaging.

    Dose Information

    Onset, Duration & After-effects

    • Onset:
      • 60-120 minutes
    • Duration:
      • 6-8 hours
    • After-effects:
      • 1-12 hours

    Effects

    • Delirium
    • dream-like experiences
    • paranoia
    • visual and audio distortions
    • dry mouth
    • muscle cramps
    • nausea
    • dysphoria
    • tremors
    • Often described as a pretty negative experience

    Helpful Links

    💊 Pill Identifier 📘 Experience Reports (Erowid)

    Known Combinations

    These combinations are considered extremely harmful and should always be avoided.

    ghb/gbl

    Studies & References