A quick look at the best places to buy Cialis online Best subscription with free consultations: Hims | Skip to review Best for follow-up care: Roman | Skip to review Best for insurance.Do not take a double dose or more than one dose per day to make up for a missed one. This is important for your overall health and safety, as certain medications can negatively interact with each other or cause existing conditions to worsen. The starting dose we generally recommend is the 10mg pill. Erectile dysfunction is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection. We considered cost, medications available, and whether generic versions were offered to help reduce costs. · Descriptions. Tadalafil is used to treat men who have erectile dysfunction (also called sexual impotence). Tadalafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where . Tadalafil (Cialis) is available both as brand-name and generic tablets. Common side effects of this medication include headache and indigestion. Tadalafil (Cialis) does interact with some medications, such as heart and blood pressure medications, and taking them together could lead to very low blood pressure and dizziness. Dosage. 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.Phosphodiesterase type 5 PDE5 inhibitors. Tadalafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow more easily. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. According to the FDA, generic medications contain the same active ingredients as brand names, meaning there’s no difference in effectiveness or safety. That means you can have erections whenever you want or need them.