Cos PD are most ex mah.....easily each time at least $60+..... so for cough & cold, I'll bring my kids to the GP since they're abt 2 yrs old. The range of drugs pretty similiar for cough & cold actually, merely the anti-histamine for cold/flu, expectorant or suppression cough med.
In fact, the older/milder range of these drugs can be bought off the pharmacy and if the kids or adults like us just started with flu, we can just 'self-medicate' through drugs from the pharmacy. Off course for toddlers or preschoolers, there're also concerns abt chest infection, so I'll rather bring them to the GP for "professional check" on the chest.....