These are commonly prescribed for an enlarged prostate or male pattern baldness. Make a list of all medications, vitamins, herbal remedies and supplements you take. Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. Just visit a participating pharmacy. What you can do Take these steps to prepare for your appointment: Ask what you need to do ahead of time. Online telehealth services like Lemonaid offer you both safety and convenience. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects.ED may be due to different factors affecting blood vessels, nerves, or hormones. Mental health factors can also play a role. It’s estimated that over million men experience ED worldwide. Phosphodiesterase type 5 (PDE5) inhibitors, like sildenafil (Viagra) and tadalafil (Cialis), are often first-choice medications to treat ED. can start in about 10 minutes, can take 1 hour for maximum effect. typical starting dose is 50 mg, can be increased to mg. Tadalafil (Cialis) when you need it, or regularly every day. can. Viagra, Cialis, Levitra, and Stendra are oral medications for treating erectile dysfunction. Check out side-by-side comparisons of all four drugs. Cost of ED medication with insurance.