These medicines all work well for ED. Is 20mg of Cialis better than mg of Viagra? You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription. Viagra vs. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. Symptoms may include sudden urges to urinate urgency , difficulty in starting urination hesitancy , a weak urine stream, and more frequent urination — especially at night.You may be able to get a day supply of Cialis if approved by your insurance company. This could reduce your number of trips to the pharmacy and help . The dose of Cialis you need will depend on whether you’re taking it daily or as needed. Daily doses are often between and 5 milligrams (mg). The as-needed dose is usually 10 mg but can range from 5–20 mg. The typicaldose of Viagra is 50 mg. However, the dosage can range from 25– mg. We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, known as .