You don’t need to be a pharmacist or a doctor for this. Look up the generic name of what was prescribed (usually a longer name, sometimes with two words, you can Google this) and look up the generic name for what is being given to you (you can find this behind the packaging, usually mentioned under composition). If it doesn’t match, specifically ask the pharmacist that you need the <generic name>.
You can try tipping off local journalists or news outlets that seem trustworthy. Or file a complaint (not sure where).