It also helps to close other blood vessels to restrict blood flowing out of the penis, and this keeps blood in the corpus cavernosum, helping the penis stay hard. By stopping this enzyme from working, Tadalafil allows blood vessels near the penis to dilate, so blood flows into the penis. The typicaldose of Viagra is 50 mg. You can get it as both a weekend and a daily tablet. Daily doses are often between 2. Read more on male sexual health on the Sexual Health Australia site. This boosts circulation so blood can get into the penis more easily, meaning better erections that stick around for more time.Roman is a telehealth prescription service and online pharmacy that provides prescription Cialis for ED and a host of other conditions, like hair loss, cold sores, and premature ejaculation. When. The drug comes in low-dose versions that can be taken daily. This means you can have sex at any time, rather than needing to take a pill from time to time as needed like other ED brands. The starting dose for daily-use Cialis is milligrams (mg). If that doesn’t work, you can increase your daily dose up to 5 mg. The most commonly reported side effects in patients treated with Cialis during the testing of the product were: headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who.