Injecting is the riskiest method of taking heroin. The dose reaches the brain almost immediately, increasing the possibility of overdose. Impurities are introduced directly into the bloodstream. This can cause septacaemia and other infections. Repeated injections damage the veins, leading to thrombosis and abscesses.
Many people stop using heroin on their own, without help.
Withdrawal symptoms vary and rarely need medical help. The worst thing may be the fear of withdrawal itself. Symptoms subside after the first ten days or so. Short-term medication to reduce withdrawal symptoms. Referral to hospital for an in-patient withdrawal.