When it comes to taking prescription medications, it's important to understand the potential risks associated with them. Fildena 100 mg is no exception. As with any medication, there are some precautions and possible side effects that may occur when taking Fildena 100 mg. It's important to speak with your doctor or pharmacist before taking any medication, including Fildena 100 mg. Your doctor will be able to provide you with a thorough understanding of potential risks associated with the medication and can advise you on how to properly take it. Possible side effects of Fildena 100 mg include headache, nausea, vomiting, dizziness, flushing, stomach discomfort and blurred vision. In rare cases, more serious side effects such as chest pain, irregular heartbeat or fainting may occur. If any of these serious side effects occur while taking Fildena 100 mg, stop taking the medication immediately and seek medical attention right away.