Fildena Professional 100 Tablet, like any medication, can potentially cause allergic reactions in some individuals. Symptoms of an allergic reaction may include rash, itching, swelling, dizziness, or difficulty breathing. If you experience any of these symptoms after taking Fildena Professional, it is crucial to seek medical attention immediately. While allergic reactions are rare, they can be serious. It is important to inform your healthcare provider of any known allergies or previous adverse reactions to medications before starting Fildena Professional. They can help assess your risk and provide guidance on alternative treatments if necessary.