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Do you think you might have HPPD?
Take this survey out of University of East London,
which attempts to understand the inner experiences of
people with lasting perceptual changes from use of
psychoactive drugs, (diagnosed or not). It investigates
factors that could create distress or effect quality of life.
by Erowid
Caution : Dose information should not be taken as recommendations. [see below]
Tramadol Dosages
25 mg
50-100 mg
75 - 200 mg
250+ mg
Tramadol is considered a relatively mild opioid, causing analgesia (pain reduction), lethargy, and mild euphoria.
HIGH DOSE DANGER : Doses over 300 mg can be physically dangerous in non-tolerated or smaller users.

TRAMADOL : Ultram is produced by Ortho-McNeil Pharmaceutical. Ultram comes in 50 mg tablets and is taken orally. It is prescribed at 50-100 mg every 4 to 6 hours, not to exceed 400 mg per day.

ULTRACET : Ultracet is produced by Ortho-McNeil Pharmaceutical. It comes in tablet form and is taken orally. Each tablet contains both 37.5 mg tramadol and 325 mg acetaminophen/paracetamol. Acetaminophen can cause liver problems at high doses. It may not be safe for heavy alcohol drinkers or those with liver problems to take even moderately high levels of acetaminophen.

Every individual reacts differently to every chemical.

Erowid's dosage information is a summary of data gathered from users, research, and other resources. This information is intended to describe the range of dosages people report using. It should not be construed as a recommendation of any sort. Individuals can respond very differently to the same dosage. What is safe for one can be deadly for another.