So my son has the common cold, and I know how well he is he always fights it off in like 2 or 3 days…

So my son has the common cold, and I know how well he is he always fights it off in like 2 or 3 days and my mom gave my son adult liquid medicine to my 23 month old son, while I was at work without even knowing. Highly mad! What do some of you moms think?