Final answer:
Inderal, or propranolol, is used primarily for the prevention of migraine headaches and is not meant for treatment during an active migraine attack. The answer is a) Prevent an attack. It is a prophylactic medication that works by affecting blood flow.
Step-by-step explanation:
Inderal, which is the brand name for propranolol, is a medication that belongs to a class of drugs known as beta blockers. It is primarily used in the prevention of migraine headaches rather than treating an attack once it has started. The correct answer to the question is a) Prevent an attack. Beta blockers like Inderal work by affecting the flow of blood through veins and arteries, which can help reduce the frequency and intensity of migraine headaches.
Inderal is not typically used to treat a migraine attack after it has begun, as it does not alleviate migraine symptoms quickly enough to offer relief during an acute attack. Instead, it is prescribed as a prophylactic, or preventive measure, to reduce the number of future episodes.