What if I mix drugs?

Using more than one drug can make it hard to make safe decisions about how much to take of each drug. Drugs and alcohol can slow reaction times and decrease nerve endings, making self injuring behaviors even more dangerous while under the influence. For example, someone who incorrectly injects may cause serious or even fatal wounds before realizing the depth or severity. 

You are also at an increased risk of overdosing. Mixing pills, alcohol, methadone, and heroin can quickly lead to overdose. Some drugs are slower acting then others. You can increase the risk of overdosing by taking too much at once without realising. Some drugs increase the strength (potency) of others.