FKN 150mg Tablet is a medication used to treat fungal infections in the mouth, throat, vagina, and other parts of the body. It kills fungi by destroying their cell membranes. The dosage and duration depend on the condition and should be taken as prescribed by the doctor. It should be taken evenly spaced and continued until the prescription is finished. Common side effects include stomach pain, headache, and nausea. It should not be taken if pregnant, has a history of heart failure, a weak immune system, kidney problems, or liver problems. It may also cause dizziness, so it should not be used for more than a month.