My son is 2yrs and 8months what can he take for a cold?

URI. Just nasal saline drops and suctioning as needed, a humidifier, and fever reducer if needed. Cold medicines are contraindicated and can have bad side effects.
Homeopathic remedies. He can take homeopathic cough medicine or honey for cough, saline drops for congestion, natural immune boosters, healthy foods(no sweet, sugary foods), plenty of rest and fluids. You can give him epsom salt baths in lukewarm water for natural fever reduction.
Acute respiratory . Auri last only few days. Make baby comfortable by suctioning nose with bulb syringe or with saline sol. Putting humidifier and plenty of fluid intake for less coughing.