Not so. According to the Wikipedia entry on Drug Policy of Portugal, "In July 2001, a new law maintained the status of illegality for using or possessing any drug for personal use without authorization. The offense was changed from a criminal one, with prison a possible punishment, to an administrative one if the amount possessed was no more than a ten-day supply ....  Even if there are no criminal penalties, these changes did not legalize drug use in Portugal. Possession has remained prohibited by Portuguese law, and criminal penalties are still applied to drug growers, dealers and traffickers. Despite this, the law was still associated with a nearly 50% decrease in convictions and imprisonments of drug traffickers from 2001 to 2015."