The client diagnosed with migraine headaches that occur every 2 to 3 days is placed on preventive therapy with the beta blocker propranolol (Inderal). Which data indicates the medication is effective...

The client diagnosed with migraine headaches that occur every 2 to 3 days is placed on preventive therapy with the beta blocker propranolol (Inderal). Which data indicates the medication is effective

1. The client has had only one headache in the past week.

2. The client’s apical pulse is 78 beats per minute.

3. The client has developed orthostatic hypotension.

4. The client supplemented Inderal with Imitrex four times.