Counterfeit medications are medicines (like pills and injections) that look like the real thing but are actually fake. They are made by people who are trying to make money without caring about whether or not the medicine is safe. They can be full of dangerous ingredients, or contain none of the intended medicine at all! They can also be weak and not work like they should, or be too strong and cause dangerous side effects. It's important to always buy medications from trusted sources, such as your doctor or pharmacist, to make sure you're getting real and safe medicines.