Synthetic drug markets in Bangladesh, Nepal, Maldives and Sri Lanka show unique patterns yet share urgent challenges in detection, precursors and regional cooperation, according to a new UNODC assessment launched in Kathmandu.

Synthetic drug markets across South Asia are evolving along distinct national trajectories while confronting a shared set of enforcement and public-health vulnerabilities, according to a new United Nations Office on Drugs and Crime (UNODC) regional report. Titled South Asia in Focus: Synthetic Drugs and Precursor Trends, the assessment examines Bangladesh, the Maldives, Nepal and Sri Lanka and finds that each country faces a different primary threat – yet all struggle with rapidly changing substances, multi-channel trafficking, precursor diversion and the need for stronger forensic and financial-intelligence capabilities.

The report draws on national data, forensic and precursor information, documented cases and consultations with authorities in law enforcement, customs, health and financial intelligence. The initiative received financial support from the US government.

Four Countries, Four Market Profiles

Bangladesh continues to host an established high-volume market for yaba – amphetamine-type stimulant tablets typically combining methamphetamine and caffeine. Nationally reported seizures of yaba and related ATS tablets climbed to 43.56 million in 2025 after a sharp decline the previous year. Regional analysis situated Bangladesh within a wider methamphetamine-tablet economy linked to South-East Asian production centres, particularly Myanmar. Cross-border flows along the Bangladesh-Myanmar frontier remain a persistent concern.

In Nepal the dominant challenge is the diversion and illicit distribution of controlled pharmaceuticals. Tramadol, tapentadol, benzodiazepines and codeine preparations move through land routes, passenger and cargo channels, and postal and courier services. One February 2025 operation in Kathmandu alone recovered 564,100 tramadol tablets. The report underscores how pharmaceutical diversion exploits gaps in monitoring and creates parallel markets that are harder to detect than traditional plant-based drugs.

The Maldives faces exposure through multiple vectors: maritime, aviation, postal and courier channels. Seizures of synthetic drugs rose from 25.27 kg in 2023 to 38.31 kg in 2024, with a further 16.04 kg recorded in the first half of 2025. The archipelago’s reliance on air and sea connectivity makes it particularly vulnerable to small, high-value consignments concealed in legitimate trade and passenger traffic.

Sri Lanka has seen methamphetamine emerge as the principal synthetic drug encountered by authorities. Methamphetamine-related arrests reached 92,650 in 2025, accounting for 35.3 per cent of all drug arrests. Maritime trafficking remains the main conduit for large consignments, while smaller quantities arrive via air passengers, postal and courier services. Crystal methamphetamine (“ice”) has become especially prominent in recent enforcement data.

Shared Regional Challenges

Despite these differences, the report identifies five common regional challenges. First, the rapid evolution of substances demands stronger early-warning systems and forensic capacity so that new psychoactive substances can be identified and controlled before they become entrenched. Second, trafficking occurs through multiple overlapping channels – land, sea, air, postal and digital – requiring coordinated interdiction. Third, gaps persist in monitoring the movement of precursor chemicals and the diversion of legitimate pharmaceuticals. Fourth, poly-drug use complicates both treatment responses and law-enforcement profiling. Fifth, authorities still need better tools to map criminal networks, follow illicit financial flows and exploit digital evidence.

These findings align with broader regional trends documented by UNODC and the International Narcotics Control Board. Methamphetamine seizures across South Asia have risen sharply over the past decade, with significant westward flows from Myanmar into north-east India and Bangladesh. Coastal states remain exposed to maritime consignments originating in the Golden Crescent and Golden Triangle. At the same time, traditional opiate markets continue to exert pressure, creating a dual challenge of plant-based and synthetic threats.

Practical Tools for National Response

Alongside the assessment, UNODC launched three practical tools designed to translate evidence into operational capacity. The first is a guidance document for strengthening national responses to synthetic drugs. The second is an operational reference guide for investigators. The third comprises integrated training modules covering intelligence-led policing, forensic detection, special investigative techniques, international cooperation and asset recovery. These resources are intended to help authorities detect emerging substances faster, connect cases across borders, trace illicit proceeds and build practitioner skills.

The emphasis on financial investigation and asset recovery reflects a recognition that pure interdiction is insufficient. Trafficking networks increasingly use digital platforms, cryptocurrencies and legitimate commercial channels. Strengthening the ability to follow the money is therefore essential if seizures are to disrupt the underlying business model rather than merely remove product from the street.

Broader Context and Regional Cooperation

South Asia’s synthetic-drug landscape cannot be separated from wider dynamics in East and South-East Asia, where methamphetamine production in Myanmar’s Shan State has reached record levels and trafficking routes have expanded westward. India, though outside the four-country assessment, functions both as a major source of precursor chemicals and as a transit and destination market. Maritime routes linking the Bay of Bengal and the Indian Ocean continue to expose coastal nations to large-scale consignments.

Regional mechanisms such as BIMSTEC and bilateral law-enforcement dialogues – exemplified by recent India-Sri Lanka director-general level talks – offer platforms for information sharing and joint operations. Yet the report makes clear that cooperation must extend beyond seizures to include forensic data exchange, early-warning networks and coordinated control of precursors.

Public-health dimensions remain equally pressing. Synthetic stimulants and diverted pharmaceuticals carry high risks of dependence, overdose and long-term harm, particularly among young people. Treatment capacity across the four countries is limited, and poly-drug use further complicates clinical responses. The report implicitly calls for balanced strategies that combine supply reduction with demand reduction and harm-reduction measures.

Sustained Political Will

The launch of South Asia in Focus and its accompanying tools marks a concrete step toward more evidence-based and coordinated action. By documenting distinct national patterns while highlighting shared vulnerabilities, the assessment provides a common analytical foundation for policymakers, investigators and health authorities. Success will depend on sustained political will, adequate resourcing of forensic and financial-intelligence units, and genuine regional collaboration.

As synthetic markets continue to adapt – shifting substances, routes and methods – the capacity of South Asian states to detect, investigate and disrupt them will determine whether the region can prevent these markets from becoming further entrenched. The UNODC report and tools offer a practical roadmap; the test now lies in implementation.