WASHINGTON: Hundreds of chronically ill residents of the US capital will be able to buy government-sanctioned marijuana by the end of the year under a measure unanimously approved by the District of Columbia Council.

Without debate, the council on Tuesday authorised five medical marijuana distribution centres throughout the city, a number that could grow to eight in coming years. A patient who has HIV, glaucoma, cancer or a ''chronic and lasting disease'' will be able to receive a doctor's recommendation to possess up to two ounces (56 grams) of marijuana in a 30-day period.

Medical marijuana... legally grown in California. Credit:AP

Patients will not be allowed to grow marijuana but will be able to buy it from dispensaries licensed and regulated by the Department of Health. Some may qualify to receive their drugs free or at reduced cost.

''This legislation seeks to avoid problems while assuring the district moves forward with a medical marijuana program that is based on evidence and best practices,'' said David Catania, chairman of the council's health committee.