Antiparasitic medicines or drugs are known to attack parasitic agents of infections and destroy them or prohibit their growth forever. They are usually effective in the treatment of parasitic diseases caused by helminths, amoeba, ectoparasites, parasitic fungi, protozoa, and similar micro-organisms. 

Antiparasitics are one of the antimicrobial drugs which may carry properties of antibiotics that target bacteria; as well as that of antifungals that target fungi.

There are certain broad-Spectrum antiparasitics medicines that are to a great extent similar to the broad-spectrum antibiotic medicines for bacteria. Again, there are some antibiotics that are anti-parasitic in nature having the capacity of treating a wide range of parasitic infections caused by parasites of various classes.