Lyric discussion by Dyst 

Cover art for Prescription lyrics by Mindless Self Indulgence

Its not about drugs, or the 'rush from the crowd'. Its about masturbation. The first three lines make it pretty clear.

"I'm the doctor, I'm the patient" He's giving himself the 'prescription'

"Don't forget that, it's important" Literally.

"If ya love me, like I love me" Like he loves himself.