I’m wondering if you should take periodic breaks to maintain it’s effectiveness. When in a flaccid state penis also appears to be more ‘hung’. How can I buy tadalafil? Three cents a day for the joy of having hard, healthy erections again. Maybe 15mg is better I’m starting to experiment. My dick was hard during masturbation and maintained throughout. Tadalafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow more easily.Reviews and ratings for Cialis. reviews submitted with a average score. But at last Cialis has answered our prayers. I take Cialis 10mg and the effect lasts for at least 36 hours. Rock hard erections that last as long as required, I feel like a “real man” once again. My partner and I are a pair of very, very happy “golden oldies”.”. Cialis lasts up to 36 hours in the body, while Viagra lasts 4–6 hours in the body. Both are taken 30 minutes before sex. Cialis can cause limb pain, while Viagra can cause vision change, rash. Tadalafil, or generic Cialis, is most commonly used to treat erectile dysfunction (ED). However, it’s also used to treat benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension.