Cialis complete guide by Doktererectie! Read about Male pills usage, inform yourself, get the most benefits and stay safe. Timing matters. You need to plan for a minimum of two hours between the last thing you eat and ingesting the tablet. The dose should be taken one hour before sexual activity. There are limitations as to how often you can take Viagra. You should NOT take the dose more than once per day. What and when you eat can impair the effectiveness of Viagra. Avoid fatty meals on days when you plan on taking Viagra. This can cause Viagra to …