Manipulation of prescriptions by patients - what must a doctor do?

Over-the-counter use of medication via chemists, including the use of psychiatric medication, has always been a cause of worry in the Indian subcontinent. Over the last two years, the rules on dispensing psychiatric medication have become stringent and chemists have to dispense the exact amount of medicine written on the prescription for the time duration mentioned. The chemist also stamps the prescription with the amount of medicine dispensed so that the patient does not use the prescription at another chemist's or counter to obtain more than the amount prescribed. This means that patients must follow up with the psychiatrist regularly, have themselves evaluated, and get a fresh prescription that must be signed by the doctor and also carry his seal. There are many patients who do not adhere to this rule. Many a time, chemists who have known a patient over the years tend to continue dispensing medication to the patient for durations which far exceed that prescribed by the doctor. This is rather dangerous as the patient may end up taking antidepressants, antipsychotics and sedatives for months or at times, years, without a valid prescription. They may also develop side-effects that could ensue under unsupervised consumption.