The greatest danger from mixing other drugs with amphetamines is additional strain on the heart and increased blood pressure. Be careful.

Please note: there have been very few scientific studies into the effects of combining psychoactive drugs. The information presented here is anecdotal. It is based on the subjective reports of experienced users. Different people will respond differently to different drugs and drug combination. Know your body.

alcohol the lager lout's fave. Allows extended binge drinking. Increase likelihood of aggressive / irresponsible behaviour. Not good for liver and kidneys. Terrible hangover

cannabis can take the edge of the buzz

cocaine unlikely combination as the effects are so similar, danger of increased toxicity and strain on heart

ecstasy extends E experience, increased energy and euphoria, but also strain on heart and risk of over-heating. Moderation recommended.

ghb no information available - can you help?

heroin suprisingly common amongst heavy speed users as heroin provides physical grounding to speed's more psychotic tendencies

ketamine fast and slow, leading to intense Matrix-like perception of time changes - no increased health risks

LSD has its own speedy effect

mushrooms increased weirdness; energising; paranoia usually increased; comedown can be rocky

tobacco speeding smokers usually smoke more cigarettes, usual perils of tobacco apply