Dosage Donations and memberships help keep Erowid online. The numbers on this page are approximations only and should not be used to determine actual dosages. For some information about dosage at tolerance levels, see Heroin Tolerance Dosage Levels .
Every individual reacts differently to every chemical.
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.