When de Alwis was first taken to Hendala, this was the treatment he received.
Then came dapsone - a drug with unpleasant side effects, but a high success rate.
But it is in cities in the western province, among Sri Lanka's urban populations, where the highest number of leprosy patients are found.
K Mohammed still remembers the doctor asking him whether he was married.
In fact, within a few days of being on the regimen, a patient with leprosy is no longer contagious.