Clarithromycin CYP3A4, involved in the metabolism of many other commonly prescribed drugs. Taking clarithromycin with other medications that are metabolized by CYP3A4 may lead to unexpected increases or decreases in drug levels. A few of the common interactions are listed below. Clarithromycin has been observed to have a dangerous interaction with colchicine as the result of inhibition of CYP3A4 metabolism and P-glycoprotein transport. Combining these two drugs may lead to fatal colchicine toxicity, particularly in patients with renal insufficiency. Taking clarithromycin concurrently with certain statins (a class of drugs used to reduce blood serum cholesterol levels) increases the risk of side
Specialty drugs in the United States but some—such as Pfizer and Amgen—are also developing biosimilars." In 2013 AfPA director David Charles published an article on specialty drugs in which he agreed with the findings of the Congressional Budget Office that spending on prescription medications "saves costs in other areas of healthcare spending". He observed that specialty drugs are so high priced that many patients do not fill prescriptions resulting in more serious health problems increasing. His article referred to specialty drugs such as "new cancer drugs specially formulated for patients with specific genetic markers". He explained the high cost of these "individualized medications based on diagnostic