Pick n Pay Pharmacy at Life Style Centurion

I went to the Pick n Pay Pharmacy at Life Style Centurion. I asked the pharmacist for something for my 3-year-old twins. I was holding one of them in my arms. Something that can help with runny noses and cough. They gave me medicine and I trusted them that they know what they are talking about. After almost 2 days of giving them the meds, they started seeing things, getting bad dreams and they got hyperactive. I thought that maybe it was the meds, so I removed the sticker placed by the pharmacy and I noticed that it was for kids from 6 years and older. An overdose of the meds can cause hallucinations and hyperactive. How can they give me meds for three-year-old that is for kids from 6 year olds