Schering-Plough ( SGP) shares gained Tuesday as the drugmaker said the Food and Drug administration has agreed to review its new drug application for its treatment of invasive fungal infection. The New Jersey-based company said its posaconazole oral suspension is a new chemical entity that exhibits potent antifungal activity in vitro against a wide range of fungal pathogens, including both yeasts and molds. "Posaconazole provides an oral therapy option for these serious infections caused by a variety of fungal organisms, including those resistant to other drugs," the company said in a statement. Invasive fungal infections most often occur in severely immunocompromised patients, such as organ transplant patients or cancer patients undergoing chemotherapy. Schering also plans to file a similar new drug application with European regulators. Shares rose 35 cents, or 2%, to $17.90 in premarket trading.