Standby tablets usually refer to aminoglutethimide tablets, which cost about a dozen dollars a box. Aminoglutethimide tablets are a pain reliever that is good for moderate pain. The tablets contain acetaminophen and codeine phosphate, of which codeine phosphate is an opioid painkiller and acetaminophen is a non-steroidal anti-inflammatory drug. Both drugs have some pain-relieving effects, as well as some fever-reducing and cough-relieving effects. Acetaminophen tablets can be used for pain relief after surgery, as well as for joint, muscle, and bone pain, and in the treatment of headaches, neuralgia, toothache, and menstrual cramps. Generally, one tablet is taken three times a day. If the pain is more intense, the dosage can be increased.