A nurse is caring for a client who has a new prescription for clonidine. The nurse should inform the client that which of the following findings is an adverse effect of this medication?

A is incorrect because diarrhea is not an adverse effect of clonidine, but rather a symptom of other conditions such as infection, inflammation, or food intolerance. B is correct because dry mouth is a common adverse effect of clonidine, which is an alpha-2 adrenergic agonist that reduces sympathetic nervous system activity. C is incorrect because photophobia, or sensitivity to light, is not an adverse effect of clonidine, but rather a symptom of other conditions such as migraine, eye injury, or infection. D is incorrect because bruising, or bleeding under the skin, is not an adverse effect of clonidine, but rather a symptom of other conditions such as coagulation disorders, vitamin deficiency, or trauma.