The medicines which stop the growth of disease-causing microorganisms are known as:
Antibiotics
Antibiotic is a medicine (such as penicillin or its derivatives) that inhibits the growth of or destroys microorganisms.
Vitamins are substances that your body needs to grow and develop normally.
Antibodies are chemicals that are produced by the immune cells in your body to fight against foreign bodies.
Microbidonts is a made-up word.