Codeine comes in several dosages, which is prescribed based on the severity of the pain or symptoms the patient is experiencing. When a patient takes Codeine for a long period of time their dosage is sometimes elevated as they develop tolerance to their current dosage. The average single dose varies between 15 and 60 mg. The total daily dosage is generally 60 to 240 mg. The dosage Codeine comes in will vary depending on the reason for taking the drug, your weight and height, and tolerance. Follow the dosage given to you by your doctor.