Par Pharmaceutical Companies, Inc. was founded in 1978 and is based in Woodcliff Lake, New Jersey. Par Pharmaceutical Companies, Inc., through its subsidiary, Par Pharmaceutical, Inc. develops, manufactures, and distributes generic and branded pharmaceuticals drugs in the United States. Its principal generic products include Metoprolol succinate ER, Fluticasone, Meclizine Hydrochloride, Cabergoline, Sumatriptan succinate injection, Propranolol HCl ER, amoxicillin products, Dronabinol, Ibuprofen Rx, Megestrol oral suspension, Methimazole, Fluoxetine, Lovastatin, Tramadol HCl and acetaminophen tablets, Ranitidine HCl Syrup, Quinapril, and Cefprozil. The company offers its drugs in the solid oral dosage form, such as tablets, caplets, and two-piece hard-shell capsules, as well as oral suspension products and certain products in the semi-solid form of a cream.It markets its products to wholesalers, drug store chains, supermarket chains, mass merchandisers, distributors, managed health care organizations, mail order accounts, drug distributors, clinics, and government agencies. The company's brand products include Megace ES drugs for the treatment of anorexia, cachexia, or any unexplained significant weight loss in patients with a diagnosis of AIDS; and NanoCrystal Dispersion for megestrol acetate oral suspension. It has a joint venture with Rhodes Technology to research, develop, commercialize, and market pharmaceutical preparations for human therapy; a license and commercialization agreement with Intellipharmaceutics Corp. for the development of Dexmethylphenidate XR; and a development and supply agreement with Cipla Limited for the development of one generic product. The company has a collaboration agreement with Actavis Group for the development of 4 extended release generic products, such as Nifedipine XR, Methylphenidate LA, Zolpidem CR, and Alfuzosin.