During the pandemic, rules prohibiting providers from prescribing these types of drugs without seeing a patient in person were waived. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. Cialis Daily tadalafil : This low-dose Cialis works by increasing blood flow to the penis over time, making it easier to have an erection when aroused. It’s available in 50 mg, mg, and mg tablets. Also, look into whether expediting is offered. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects.Disp Pack. Tablet. No data.. Dosage. mg. 5mg. 10mg. 20mg. No data.. Quantity. 5. 6. No data.. Read More About This Drug. Cialis (tadalafil) is a prescription medication for those with erectile dysfunction. Many providers sell Cialis online — learn about the safest and most discreet providers here. Cialis can cost around $ to $ per month out of pocket, depending on the dosage you need. The first generic version of Cialis was released in October , and other manufacturers have released generic versions since then. This has increased market competition, driving prices down.