Hydrocodone is a doctor Suggested Pain Relief medicine. It is used to treat severe pain. Hydrocodone is used for a short term period, use it in a long time period can cause effects on the body. Hydrocodone m367 Side Effects are Dryness in mouth, Headache, Constipation, yellow eyes or skin, Drowsiness, Skin rashes, itching, Abdominal pain,Breathing problems, Sleeping problems, Weakness or tiredness, Stomach cramps, Muscle or joint pain,Nausea and vomiting. Do not use this medicine for normal pain. Always contact a doctor before using this medicine.