Fildena Chewable 100 mg, it's important to talk to your doctor, especially if you have any underlying health conditions or are taking other medications. Your doctor can help determine if Fildena Chewable 100 mg is safe and appropriate for you based on your medical history and current medications. Common side effects of sildenafil citrate include headache, flushing, indigestion, nasal congestion, and dizziness. Serious side effects such as sudden vision loss or hearing loss are rare but require immediate medical attention.