He is being treated for his somnolence.

The correct answer is D. sleepiness. Somnolence is a medical term for excessive sleepiness. It is a common symptom of many conditions, including sleep apnea, narcolepsy, and depression. Somnolence can also be caused by certain medications, such as antihistamines and antidepressants.

Weakness is a feeling of being tired or having little energy. It can be caused by a variety of factors, including illness, injury, or medication.

Severe pain in the joints is

Intoxication is a state of being affected by drugs or alcohol. It can cause a variety of symptoms, including drowsiness, confusion, and impaired judgment.