Two placebo-controlled trials reported effectiveness in 42% and 32% of patients taking 50 mg compared with 9% and 13% in the control group, respectively. The erections occurred in 20-30 minutes. The drug was well tolerated, with mild-to-moderate adverse effects, usually headaches or lightheadedness, occurring in less than 10% of patients. Tadalafil is generally well tolerated with only mild side effects. The most common side effects reported include headache, indigestion, back pain, muscle aches, facial flushing, and nasal congestion. looking for cheap viagra online? canadian pharmacy viagra for sale The recommended starting dose of tadalafil for most patients is 10 mg taken orally approximately 1 hour before sexual activity. The dose may be adjusted higher to 20 mg or lower to 5 mg depending on efficacy and tolerability. The maximum recommended dosing frequency is once per day, although for many patients tadalafil can be taken less frequently since the improvement in erectile function may last 36 hours. Tadalafil may be taken with or without food. * Avoid working for long hours. Take a break from regular routine at week ends and spend time with your partner. generic viagra here brand viagra for sale