A patient will begin using a transdermal preparation of a muscarinic antagonist for overactive bladder (OAB)
The nurse teaches the patient what to do if side effects occur. Which statement by the patient indicates the need for further teaching?
a. "I can use sugar-free gum for dry mouth."
b. "I may need laxatives for constipation."
c. "I should keep the site covered to prevent other people from getting the medicine."
d. "I will take Benadryl for any itching caused by a local reaction to the patch."
ANS: D
Benadryl is an antihistamine, and even though it is not classified as a muscarinic antagonist, it has anticholinergic effects. Giving it with a muscarinic antagonist greatly enhances these effects, so it should not be used. Muscarinic antagonists cause dry mouth, and patients should be taught to use sugar-free gum or candies to help with this. Muscarinic antagonists can cause constipation, and laxatives may be used. Medication applied topically can be transferred to others who come in contact with the skin, so the site should be covered.
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