Respected Sir, hi I evaluated your query thoroughly. For 1st question , yes he is treating as pneumonia . Your stay at home is depending on your clinical recovery and symptomatology. If breathing comfortably , no body aches , no coughing or much cold can resume work in 3-4 days. For 2nd question , you must take Advil for headache after concerning your therapist. because it requires dosage adjustments along with concurrent use of steroids. and if you have side effects such as unusual bleeding, severe abdo. pain, dizziness, light headedness, black tarry stools immediately rush to ER. Hope this clears your both questions satisfactorily. Thanks for using Health care Magic. Regards Wishing you fast and speedy recovery from the same. Take care bye dear.