A nurse is collecting data from a client who is in renal failure. The nurse should identify which of the following findings is a manifestation of hyperkalemia.

The client's symptoms of feeling dizzy, having a racing heart, and becoming pale while lying on their back may indicate supine hypotensive syndrome. This condition can occur during pregnancy when the weight of the uterus compresses the inferior vena cava, reducing blood flow to the heart and causing a drop in blood pressure.

Positioning the client on their left side helps relieve the pressure on the inferior vena cava and improves blood flow. This position allows for optimal circulation and helps alleviate the symptoms associated with supine hypotensive syndrome.

Checking the client's temperature is not necessary in this situation as the symptoms described are not typically associated with a fever. The priority is addressing the client's symptoms related to supine hypotensive syndrome.

Instructing the client to take a brisk walk is not recommended as it may exacerbate their symptoms. Walking increases physical exertion and could further decrease blood flow to the heart.

Providing the client with a glass of orange juice may be helpful if the symptoms were related to low blood sugar (hypoglycemia). However, in this case, the symptoms are more consistent with supine hypotensive syndrome. The priority is to reposition the client to improve blood flow and relieve symptoms. If the client continues to experience symptoms or if there are concerns about low blood sugar, further assessment and appropriate interventions should be implemented.

Stevens-Johnson syndrome (SJS) is a severe and potentially life-threatening skin reaction that can occur as a rare but serious side effect of allopurinol. The initial symptom often presents as a skin rash, which can progress rapidly and involve other mucous membranes such as the mouth and eyes. Fever is commonly associated with SJS.

Diplopia (double vision) is not a typical symptom of SJS. It refers to seeing two images instead of one and can be caused by various factors unrelated to allopurinol or SJS.

Tinnitus with ear pain is not a characteristic symptom of SJS. It usually relates to issues with the auditory system, such as damage to the inner ear or other underlying conditions.

Hyperreflexia (exaggerated reflexes) is not directly associated with SJS. It typically refers to an abnormal increase in the body's reflex responses and can be caused by conditions affecting the central nervous system or spinal cord.