2. Khm, doctor said: "try it", so let's buy 15 instead of 30 (for half the price) and come for more only if it actually helps.
This option illustrates an increasing problem in health care: The doctor knows better (and should) unless I do. Why did the doctor say "try it?" Probably because, especially for conditions like acid-reflux, everybody responds differently and there are no guarenteed solutions.
It is one thing for a group of medical researchers to release guidelines on standard practice for certain conditions. It is completely different when a non-medical professional types something into Google and now claims to be an expert.
What about the buying 15 to "see" if they work? Plenty of drugs, including proton-pump inhibitors, which you most likely were perscribed, take time before any effects can be seen. This type of thinking is why we have more and more antibiotic-resistant infections - people stop taking medication as soon as they feel better (or think it isn't working). Doctors can be (and are) wrong on occasion, but there are plenty of things they do that have a reason (30 days vs. 15 days may not be random, MRIs and X-rays DO NOT show the same thing) even if it isn't immediately apparent.
It is one thing for a group of medical researchers to release treatment guidelines for a certain disease. It is another when a non-medical professional types the name of a condition into Google and then claims to be an expert.