# Mescaline Mescaline is found in San Pedro. ## Said to... - Last up to 16 hours - Best to fast the night before - # Dosing It can be hard to find the right dose as there is no way to tell just by looking at the San Pedro. Just 50g dried cactus material might contain as little as 150mg of mescaline (a threshold dose) or as much as 1150mg of mescaline (a potential overdose) ## Related - Cross [[tolerance]] with [[LSD]]. - [[drugs]]