Merck & Co., Inc. provides health care solutions worldwide. The company offers therapeutic and preventive agents to treat cardiovascular, type 2 diabetes, asthma, nasal allergy symptoms, allergic rhinitis, chronic hepatitis C virus, HIV-1 infection, fungal infections, intra-abdominal infections, hypertension, arthritis and pain, inflammatory, osteoporosis, male pattern hair loss, and fertility diseases. It also provides neuromuscular blocking agents for use in surgery; anti-bacterial products for skin and skin structure infections; cholesterol modifying medicines; non-sedating antihistamine; and vaginal contraceptive products. In addition, the company offers products to prevent chemotherapy-induced and post-operative nausea and vomiting; treat brain tumors; treat melanoma and metastatic non-small-cell lung cancer; and prevent diseases caused by human papillomavirus, as well as vaccines for measles, mumps, rubella, varicella, chickenpox, shingles, rotavirus gastroenteritis, and pneumococcal diseases. Further, it provides antibiotic and anti-inflammatory drugs to treat infectious and respiratory diseases, fertility disorders, and pneumonia in cattle, horses, and swine; vaccines for poultry; parasiticide for sea lice in salmon; and antibiotics for the treatment of C. difficile, and vaccines against bacterial and viral disease in fish. Additionally, the company offers companion animal products, such as ointments for acute and chronic otitis; diabetes mellitus treatment for dogs and cats; anthelmintic products; chewable tablets to treat fleas and ticks in dogs; and products for protection against bites from fleas, ticks, mosquitoes, and sandflies. It serves drug wholesalers and retailers, hospitals, government agencies and entities, physicians, physician distributors, veterinarians, distributors, animal producers, and managed health care providers.