NDDCB is the pioneer Government Institution which discharges its functions with an aim to eradicate the drug menace from Sri Lanka. Among the other functions, providing treatment to the drug dependants and rehabilitation of drug dependants are main roles of the NDDCB. Four treatment and rehabilitation centers are being conducted under the purview of the board throughout the country with greater focus in Colombo, Kandy, Galle and Gampaha districts. Counseling service and residential treatment facilities are being provided for the drug addicts at these treatment centers.