Abstract
The treatment of systemic fungus infections has been possible with the discovery of amphotericin B (1). This was followed by the discovery of flucytosine in 1957 (2) and after 1960's azoles and their derivatives in addition to triazoles (3). The fact that the illness gets more serious in patients whose immune system has been depressed has made it necessary to treat it with systemic treatment due to the increase in the probability of recurrence. The need for systemic antifungal medications has been increasing steadily because the existent antifungal medications have many toxic side effects and because the resistance to these medications have been getting stronger (4,5). The reasons for the need to synthesise new antifungals lately can be listed as the rapid increase in the number of AIDS patients, bone marrow, organ transplants, the use of antineoplastic medications, the prolonged use of corticosteroids and the haphazard use of antibiotics, which depress the immune system and, therefore cause opportunistic infections to increase in systemic fungus infections in healty individuals. As a results of all, the research for the synthesis of new compounds has been rise on this field. In this rewieved takes a look at opportunistic infections, the medications used to cure these infections, and outlines the new objectives to come up with more selective antifungal compounds and the recent research done in this field