And yes, the drug is outrageously expensive, whatever the dosage. Where I am, it isn't covered in any circumstances. So I'm not on it.
Beware of free samples from a doctor, btw. If the drug works for you, you will need to be on it for life, and you are not going to get free samples for life. So unless you're willing to shell out the $$$ once your supply of free samples runs out, be prepared to regain the lost weight.