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Methaqualone Dosage
by Erowid

Note: Frequent users of Methaqualone build a tolerance for the drug. Dosages of over 300 mg can be dangerous for first time users. Also, some who use methaqualone recreationally sometimes drink alcohol or take other CNS depressants at the same time. Alcohol and other depressants/sleep aids can increase the effects of methaqualone and doses need to be adjusted down accordingly.

Oral Methaqualone Dosages
Threshold 75 mg
Light 150 mg
Common 300 mg
Strong 600 mg
Heavy over 600 mg
 
Onset : 30 minutes
Duration : 5 - 8 hours
Normal After Effects : 6 - 8 hours

Every individual reacts differently to every chemical.
Know your Body - Know your Mind - Know your Substance - Know your Source.

Erowid's dosage information is a summary of data gathered from users, research, and other
resources and should not be construed as recommendations. Individuals can respond
differently to the same dosage. What is safe for one can be deadly for another.

Start low with new substances.
Have trusted companion/guide/sitter/friend present and/or available.