In the Czech Republic, personal use amounts of most recreational drugs were decriminalized to a misdemeanor as of Jan 1 2010. Under the new law, possession of less than the following amounts of illicit drugs will not be a serious criminal offense: Marijuana - 15 grams (or five plants); Hashish - 5 grams; Magic mushrooms - 40 pieces; Peyote - 5 plants; LSD - 5 tablets; Ecstasy - 4 tablets; Amphetamine - 2 grams; Methamphetamine - 2 grams; Heroin - 1.5 grams; Coca - 5 plants; Cocaine - 1 gram. Possession of "larger than a small amount" of marijuana can result in a jail sentence of up to one year. For other illicit drugs, the sentence is two years.

See http://www.expats.cz/prague/article/czech-culture/czech-drug-laws/.

In April 2011, the Czech Republic banned 30 substances including the cathinones banned around the world in 2009-2011. Newly banned substances include: Butylone, Mephedrone, Methylone, Naphyrone, Salvinorin A, and others.