Cobain's first experience with heroin occurred sometime in 1986, administered to him by a local drug dealer in Tacoma, Washington, who had previously supplied him with oxycodone and aspirin. He used heroin sporadically for several years, but, by the end of 1990, his use had developed into a full-fledged addiction. Cobain claimed that he was "determined to get a habit" as a way to self-medicate his stomach condition. "It started with three days in a row of doing heroin and I don't have a stomach pain. That was such a relief," he related. However, longtime friend Buzz Osborne disputes this, saying that his stomach pain was more likely caused by his heroin use, saying "He made it up for sympathy and so he could use it as an excuse to stay loaded. Of course he was vomiting—that's what people on heroin do, they vomit. It's called 'vomiting with a smile on your face.'"