The answer to this one is "plenty of them." Page called drugs an "integral part of the whole thing." (Referring to his time with Led Zeppelin) In the early 1970s his drug of choice was cocaine (in copious amounts). In 1975 he became addicted to heroin, an addiction which lasted until the early 80s. Although heroin became his drug of choice, he still used coke as it helped him focus during busy recording sessions.