Remove from heat and add a rock or powder cocaine and stir with the tip of the capped syringe.Speedballs (injecting heroin and cocaine together) Before you cook Watch a video: Injecting heroin more safely Leave any stubborn bits – these are impurities not heroin.Gently heat the cooker from below with a lighter until the heroin has dissolved.Add just enough vitamin C or citric to dissolve the heroin.Chop the heroin finely and put a small amount into the cooker.Add just enough citric or vitamin C to dissolve the rock.Add water using a new, sterile barrel – water from a sterile amp is best or you can use cooled boiled water.If possible, clean the place where you’re going to be cooking and drawing up.If it doesn't dissolve you may need to add a pinch of vitamin C or citric.

Use a new, sterile barrel to draw up water and add it to the cooker – water from a sterile amp is best or you can use water that has been boiled then cooled.

Chop the amphetamine finely so there are no lumps and put a small amount into the cooker.

Wash your hands with soap and water or use antibacterial gel.

Amphetamine (speed, base) Before you cook

Tap the barrel and push the plunger gently to get rid of any air bubbles – never touch or lick the needle as this can cause infections.

Draw up slowly through the filter until all the liquid has gone.

Drop a new filter into the cooker, uncap the needle and carefully stick it part way into the filter.

Stir the liquid in the cooker with the tip of the cap until everything has dissolved.

Use a new, sterile barrel to draw up water and add it to the cooker – water from a sterile amp is best or you can use cooled boiled water.

Chop the cocaine finely so there are no lumps and put a small amount into the cooker.

Put a new, sterile cooker on a level surface – if you haven’t got a cooker you can use a clean spoon or a metal bottle top (take the plastic lining out first).

See more ways to reduce your risk of infections.

Get everything you need together in one place.If possible, clean the surface you’re going to cook and draw up on.Wash your hands with soap and water or use hand sanitiser gel.

Cooking cocaine