Oxycodone 30 mg is known as a strong pain killer which is used for relief of severe pain . Oxycodone 30 mg is used only by doctor's advice . This tablet starts work within 20 to 30 minutes and it works up to 12 hours to relieve pain . 30 mg of Oxycodone is very dangerous to the human body because it's overdosed and taken with alcohol . Its common side effects are dry mouth , drowsiness , sleepiness , headache and feelings of weakness and low energy . .