This is because many illnesses will require treatment in which pharmacists will need a good understanding of chemistry and chemical properties to discover what solutions will be needed to treat the illness. For example, common colds are treated by things like Zycam or Cold-Eaze.
However, for many illnesses there is no actual cure, there are usually things to tame or relieve the symptoms of an illness or there could also be an injection to prevent the occurrence of a future case of the illness.
There are injections to help prevent the possibility of diseases like tuberculosis or cervical cancer. However, many of these injections to prevent these cases can't 100% guarantee that you won't be infected, but they can lower the likelihood of the occurrence.
We do not only use medicine to bring us back to full health, a good understanding of chemistry leads to the development of other things to give us good nutrition, which also helps avoid disease.
With our understanding of chemistry we get to know what chemicals are best for growth:
- Calcium is necessary for the growth and increased strength of bones
- Protein, which is made up of amino acids, is necessary for the growth and repair of muscles. This is how we know that milk is good for our growth, and protein (fish, meat, eggs) is good for the repair of muscles. This allows us to develop other things like 'protein shakes'.
For any of these medicines to be created, the chemistry behind the solution must be fully understood. This is because some chemicals can be harmful to us or some could be better than others and so pharmacists would need to create a safe, effective drug to medicate the ill and bring them back to full health.
So overall, chemistry could actually be seen as the absolute basis of health and medicine.