Levothyroxine is the generic form of the brand-name medication Synthroid. It is used to treat low levels of thyroid hormones, also known as hypothyroidism.

Founded in 2009, Alvogen distributes about 53 drugs in the U.S. It has a commercial footprint in over 20 markets, including China, Hong Kong, Iceland, India, Luxembourg, Malaysia, Malta, the U.S., Philippines, Singapore, South Korea, Taiwan, Thailand, and Vietnam. The number of manufacturing locations was not readily available, but at least some are located in the U.S., South Korea, and Taiwan.