If you're going to give him these medicines just because it's cold season, to prevent him from cold and cough, then pls don't.
Next Steps
Pls avoid taking medicines unnecessarily & take medicines only when there are symptoms. You can consult me online on Practo for proper homeopathic treatment according to his symptoms and if he has cold and cough recurrently, then to remove his tendency to catch cold so easily.
Health Tips
It's best to have warm water, soups and take steam inhalation to prevent cold and cough. Keep the body adequately protected with woolens and put cotton in the ears.