Drink water. Dehydration is a common cause of headaches. Ibuprofin

As for Tim Leary, he's an attention whore who preached irresponsible advice. It's not a good idea for everyone to take LSD and drop out of school. It's not a good idea to become so consumed with a drug, even as mystical and moving drug as LSD. He let his own ego take over him (ironically) and half the time he was giving a speach, he was talking out of his ass to see how many people would actually listen to him. I used to look up to Tim Leary...but I don't really want to be a 50 year old bum with no job and no house after bailing out of jail early for giving up the people that broke you out of jail the first time. -_-