Health professionals do not consider one as being better than the other, and both Viagra and Cialis are well-respected erectile dysfunction treatments. If your prescription request is approved, your Cialis will be shipped to your house within three business days in discreet packaging. Once you begin the purchase process, you will need to fill out a healthcare information form. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. It’s available in 25 mg, 50 mg, and mg tablets and lasts up to 18 hours. Finding an online ED provider can feel overwhelming. Cialis was also investigated in combination with finasteride, another BPH medication, in another trial.When you buy from an unknown company, you run the risk of getting counterfeit medicines. By some estimates, more than half of all ED drugs sold online are fakes. Some of these drugs include. Depending on your symptoms and needs, you may be prescribed Viagra, sildenafil, Cialis, tadalafil, Stendra, paroxetine, or a combination of tadalafil and sildenafil, available as mints or pills. Prices range from $3 to $ per dose or $82 to $ for a monthly supply, depending on the medication.  · Below, we’ll detail nine of the most common tadalafil interactions to keep in mind. 1. Nitrates. Nitrates are used to treat and prevent angina (chest pain) caused by heart disease. Examples include nitroglycerin (Nitrostat), isosorbide mononitrate (Monoket), and isosorbide dinitrate (Isordil).