Hydrocodone 10/660mg is a medicine that belongs to a class of drugs known as opiods. It is non-steroidal but works by controlling pain and cough in the body. Relieves pain. Trusted hydrocodone 10/660mg dosage since February 2014. Relieves moderate to severe pain. The doctor will determine how many doses you need and how often to take them. Take this drug exactly as prescribed. Take with food or milk if your stomach is upset. Tell your doctor about all the medicines you take, especially antidepressants, muscle relaxants, seizure medications, antianxiety drugs or sleep aids. Take these drugs only as directed by your doctor, or according to the directions on the package labels.