I have difficulty losing weight so my doctor prescribes phetermine. my doctor is in hawaii now i am in texas.

It sounds like: You will need to find a doctor in Texas to prescribe and monitor your weight loss medication. While an inconvenience, it'll be better/safer for you in the long run, as someone should be monitoring you while you take this medication to make sure it's worthwhile continuing and that you aren't suffering some of the concerning side effects like increased blood pressure or heart rate or palpitations.

Texas doc: You will have to establish with a Texas doc. Weight loss involves multiple modalities and you should be able to find a weight loss clinic. Phentermine is a controlled substance used sometimes, but is not by itself the solution.