A pill imprinted with the M357 designation is 500 milligrams of acetaminophen and 5 milligrams of hydrocodone bitartrate notes Drugs.com. The site offers a pill identifier tool that can identify pills and capsules that are separated from their original packaging.
M357 is used to treat pain, which includes back pain, rheumatoid arthritis and cough. Hydrocodone is a prescription-only schedule 2 drug, states Drugs.com. This is the most restrictive category of drugs that is able to be legally prescribed. It has not been established as safe to ingest during pregnancy. Some trade names for this combination of drugs include Vicodin and Lortab. The drug has a high potential for abuse, which can result in a coma or death, suggests the Medicine Abuse Project.