Inclusion Criteria:

• HIV infection (as determined by positive ELISA and confirmed by Western blot)
• 18 years of age and above
• clinical picture of OPC, characterized by creamy, white, curd like patches, removable by scraping or by typical erythematous lesions (smooth red patches) on the oral mucosa, hard or soft palate and/or dorsal surface of the tongue; and microbiologically by visualization of yeast cells in Potassium hydroxide (10% KOH) preparations prepared from swab of visible lesions and confirmed positive Candida species culture

Exclusion Criteria:

• Patients who are currently receiving antifungal therapy or who had received such treatment within three days prior to enrollment in this study
• History of allergy to azole derivatives
• Abnormal liver function tests defined as alanine aminotransferase (ALT), aspartate aminotransferases (AST), or total bilirubin greater than three times the upper limit of normal; or clinical evidence of significant hepatic or renal disease within two months prior to enrollment
• Inability to tolerate oral drug administration; pregnancy or breast feeding; life expectancy of less than four weeks
• Participation in another drug study at the time of enrollment, treatment with drug which interact with fluconazole, such as vitamin K antagonists, warfarin, sulfonylurea anti-diabetic agents, rifampicin, phenytoin, isoniazid, carbamazepine and cisapride
• Documented systemic fungal infections, symptoms suggestive of esophageal candidiasis such as retrosternal chest pain, dysphagia or odynophagia unless this condition has been ruled out by endoscopic examination.
• Patients with history of alcohol abuse, drug addiction and psychiatric disorder, inability to cooperate and poor motivation will be excluded from the study.