Prozac fluoexetine while on meth

My doctor is trying to give me prozac. I smoke meth, not currently smoking but probably will be soon. It is said to potentially cause serotonin syndrome. Im trying to decide whether to start or not. It would be a small dose (20mg or less). Has anyone done before this how has it been?

Yes Ive asked my doctor he barely even knows what meth is. I know what the research says that it can cause serotonin system, not looking for advice just wanna know what yalls experiences with this combo are?