Pharmaceutical companies, like any other company, are businesses.  Therefore, they will discontinue manufacturing certain medicines for business reasons.  There may have been a decrease in demand for a particular product and thus a decreasing profit.  A newer or possibly more effective drug has been developed which causes a limited demand for the precursor drug.

However, some patients may prefer to stick with their current prescription.  Some patients may respond better to the dicontinued medicine.  Perhaps the newer drug has undesirable side effects for them and the previous drug did not.

Fortunately, using specialized equipment and chemicals which are not found in most pharmacies, a compounding pharmacist can compound a prescription that has precisely the same amount of medicine as in the discontinued product.  A compounding pharmacist will work with your physician to find the best solution to your medication problem.