Long-term heavy use of heroin can lead to a loss of appetite and sex drive, sexual dysfunction, pneumonia and constipation. Pure heroin is relatively non-toxic but is very addictive. Psychological and physical dependence are common results of long-term use and can lead to financial, dietary, lifestyle and health problems. Additives in street heroin can cause health problems including collapsed veins, abscesses and tetanus and even damage to the brain and internal organs. Dependent users develop a tolerance and need higher doses to achieve the same effects.
Withdrawal symptoms are similar to influenza.
Babies born to heroin using mothers may be born dependent on heroin. The law Heroin is illegal throughout Australia. Heavy penalties apply to possession and supply of heroin.