Cialis (tadalafil): This ED medication works with the same principle as Viagra, but lasts up to 36 hours. It’s available in mg, 5 mg, 10 mg, and 20 mg tablets. 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. You take one or 5 mg.Psychological factors like stress, depression, or anxiety can also contribute. Other conditions that may disqualify you from an ED prescription include a history of stroke, kidney or liver disease, cancer, diabetes, or a bleeding disorder. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Insurance: If you plan to use insurance, make sure the online provider accepts it. Most men start with and respond well to the 10 mg tadalafil dose. Popular ED medications found online include: Viagra sildenafil : As the first FDA-approved PDE5 inhibitor for ED, sildenafil is taken 30 minutes to four hours before sexual intercourse to help achieve and maintain an erection.Tadalafil (Cialis) is a phosphodiesterase-5 enzyme (PDE-5) inhibitor. It works by blocking PDE This is a protein in your body that breaks down the molecules that normally cause an erection. When it blocks PDE-5, tadalafil (Cialis) helps an erection occur by allowing certain muscles in the penis to relax and the penis to fill with blood. Cialis (tadalafil): This ED medication works with the same principle as Viagra, but lasts up to 36 hours. It’s available in mg, 5 mg, 10 mg, and 20 mg tablets. 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. You take one or 5 mg. Cialis is a medication approved by the Food and Drug Administration (FDA) often used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH) in those assigned male at birth.The starting dose we generally recommend is the 10mg pill. People taking nitrates like nitroglycerin Nitrostat or isosorbide mononitrate Imdur should not take PDE5 inhibitors, as doing so could result in a dangerous drop in blood pressure. Privacy: Confirm that your personal data and payment details are confidential. Most online providers require a picture of a valid ID, a selfie showing your face, and a recent blood pressure reading taken with a home blood pressure monitor or by a medical provider. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. This increase in blood flow results in a firmer, longer-lasting erection.