You can take this medicine with or without food 30 minutes before sex, depending on the dose. Most companies have an FAQ or shipping policy page you can reference to learn whether discreet packaging is available. They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction ED. In some cases, ED can cause a strain on relationships and impact self-esteem. Read our editorial process. People with heart conditions should never take ED medications without consulting a doctor. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects.Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or alcohol. Its effects . A number of them specialize in providing drugs such as Viagra, the baldness therapy Propecia (finasteride), or the weight-loss treatment Xenical. Others, based in foreign . According to price-comparison site test1.ru, generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with .