## Most Common Route of Opioid Administration in India **Key Point:** Intravenous (IV) injection is the most common route of opioid administration among individuals with opioid use disorder, particularly in India and other South Asian countries. ### Epidemiology of Routes in India | Route | Prevalence | Notes | | --- | --- | --- | | Intravenous injection | 60–75% | Most common; associated with highest risk of complications | | Smoking/chasing the dragon | 15–20% | Second most common; involves heating and inhalation | | Oral ingestion | 5–10% | Less common; slower onset, lower abuse potential | | Intranasal snorting | 5–10% | Emerging trend; lower than IV in India | **High-Yield:** IV heroin use dominates the Indian opioid use disorder landscape. This is driven by rapid onset of action, intense euphoria, and cost-effectiveness per dose. ### Clinical Significance **Clinical Pearl:** IV opioid users face the highest morbidity and mortality burden: - Injection site infections (abscess, cellulitis, osteomyelitis) - Blood-borne pathogen transmission (HIV, hepatitis B/C) - Thrombophlebitis and vascular complications - Endocarditis (particularly in right-sided valves) - Overdose and respiratory depression **Warning:** The transition from smoking to IV use is a critical escalation point in the natural history of opioid use disorder and marks increased severity and treatment urgency. ### Why IV Dominates 1. **Pharmacokinetics:** Peak plasma concentration within seconds → maximal reinforcement 2. **Economics:** Lower cost per unit effect compared to other routes 3. **Supply chain:** Heroin powder is ideal for IV preparation 4. **Social factors:** Peer influence and established networks in drug-using communities [cite:Substance Abuse and Mental Health Services Administration (SAMHSA) Treatment Improvement Protocols]
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