Problem: The nurse is preparing to administer a calcium channel blocker to a patient. The nurse knows which of the following are correct? Select all that apply. Inform patients about signs of edema and instruct them to notify the prescriber if these occur. Instruct patients to swallow sustained-release formulations whole without crushing or chewing. Monitor for diarrhea and educate patients to maintain a record of number of stools. Inform patients about manifestations of cardiac effects (e.g., slow heartbeat, shortness of breath, weight gain) and instruct them to notify the prescriber if these occur.