Final answer:
A pharmacist can sell the amount of Sudafed that is specified in the prescription order. The maximum amount that can be sold is determined by the prescribing physician.
Step-by-step explanation:
A pharmacist can sell the amount of Sudafed that is specified in the prescription order. The maximum amount that can be sold is determined by the prescribing physician and is based on factors such as the patient's condition, age, and any other medications they may be taking. The pharmacist must follow the instructions provided in the prescription order and should not exceed the prescribed amount.