The client diagnosed with migraine headaches is prescribed propranolol (Inderal), a beta blocker, for prophylaxis. Which information should the nurse teach the client?

B Teach the client to take his or her radial pulse for one (1) minute. D Discuss the need to increase artificial light in the home. C Explain this drug may make the client thirsty and have a dry mouth. A Instruct to take the medication at the first sign of headache.