No reports were found of any interaction between Zoloft® (sertraline) and the weight loss medicines. The weight loss medicines you have mentioned are to be avoided. They have considerable risk of serious side effects. As you have mentioned, one possibility is pulmonary hypertension. This can be severe and relatively irreversible. Pulmonary hypertension can cause an erratic EKG. However an erratic EKG doesn’t mean that pulmonary hypertension is the problem. Pulmonary hypertension can still occur even with a normal chest x-ray. You should ask your doctor to order an echocardiogram to know for sure if pulmonary hypertension is your problem. Attempts should also be made to determine the cause of your high blood pressure (BP).
Pheochromocytoma is a relatively rare, metabolically active tumor that could cause your symptoms of “facial flushing, extreme shortness of breath (SOB) with minimal exertion, extremely sensitive emotions, increased heart rate”.
A few months ago I also took a weight loss drug called phentermine which is similar to fastin I think. After a couple of weeks of taking it with exercise I also had sob along with chest pains. I went to a doc in box and after an ekg and a couple of tests were ran the Dr. suggested that I go to the ER. There they didn't see any major concerns with my ekg so advised me to go home and see my primary care physician. Once I saw my PP I had an echo that stated mild tricuspid regurgitation and elevated pulmonary pressure. Of course I've been online and am very stressed by the results because PH seems like a really big deal. My PP and the Cardiologist who reviewed the echo told me there was nothing to be concerned about. They didn't provide any meds only suggested I come back in 6 months for another echo.
It's been only 4 months but I've recently started to feel dizzy when I walk and somtimes while sitting. I made another appointment with a cardiologist for tomorrow morning. I'm praying that my condition has gotten better and at least not worse. Anyway, I said all this to say that I think the condition is serious and that Dr's aren't very knowledgable concerning the disease and as a result underestimate the severity. I would get a second opinion. I'll keep you posted on my second opinion if you like. Good luck to you!