Risks of emphysema, asthma, and cancer are associated with tars and hydrocarbons in inhaled smoke non-sterile injection needles long-term irritation from subcutaneous injections allergic reactions to hypodermic syringes

Risks of emphysema, asthma and cancer are associated with the tars and hydrocarbons in inhaled smoke. The tar acts to coat the bronchial sacs, in effect causing the bronchial sacs to be damaged beyond repair and suffocating the smoker over time. The hydrocarbons contain cancer causing chemicals that enter the blood stream and are carried throughout the body.