If Fildena Chewable 100 mg contains sildenafil 100 mg, it can generally be taken with or without food. However, food—especially a heavy/high-fat meal—can delay how quickly sildenafil starts working. M MIMS +1 For best predictability: Take it about 1 hour before ***** activity. A light/normal meal is generally fine. If you've just eaten a very fatty or heavy meal, expect the effect to take longer. Do not take more than one sildenafil dose in 24 hours. D DailyMed Also, 100 mg is the maximum usual as-needed sildenafil dose and isn't appropriate for everyone. If you're considering 100 mg for the first time, it's worth checking with a doctor/pharmacist first. If you tell me what you ate and roughly when you plan to take Fildena, I can explain the timing.