Enantiopure drug

Imagine you have two toys that look exactly the same, but when you turn them around, one has a mirror image that is different from the other. This is what we call "left" and "right" toys.

Now, let's pretend that those toys are actually molecules that are used to make medicine. Sometimes, it's important that the medicine is made up of molecules that are all the same "handedness". So, if we were making medicine with the left toy molecules, we need to make sure that only left toy molecules are used and not any right toy molecules. This is what we call an "enantiopure drug".

If we use a mixture of left and right toy molecules, this can cause problems because our body might not be able to use the medicine properly. It's like trying to fit a square toy into a round hole. But if we only use the left toy molecules or right toy molecules, everything will fit perfectly and our body can use the medicine to help us get better.