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 10-325 mg Side Effects are Constipation, Nausea, Dizziness, Diarrhea, Abdominal pain, Rashes, Itches, Difficulty in breathing, Drowsiness, Sweating, Runny nose, Anxiety, Hallucinations. Do not use this medicine for normal pain. Always contact a doctor before using this medicine.