What are three of the dangers associated with using illegal drugs?

1. Impurities
2. Drug Interactions
3. Side Effects & Exposure risks

Many illegal drugs are not pure drugs, they are "cut" or mixed or diluted with other drugs or products like lactose. This can be extremely dangerous if drugs with same mechanism of action (pharmacology) are mixed together resulting in more intense effects and possible system failure (like breather problems due to respiratory depression etc.).

Drugs can also interaction with other drugs, over the counter products, herbals or prescription drugs resulting in dangerous end results, complications or even death.

You can intensify the side effects of drug use and lead to increased risk of exposure to HIV/AIDS (needle sharing) and damage to the arterial-venous capillaries due to the needle sticks.