Sildenafil, Tadalafil and Vardenafil are PDE-5 inhibitors which are better known under their brand names Viagra, Cialis and Levitra, here you get them all. All three products are produced by Centurion Laboratories, so quality in ensured.

Sildenafil

The effect of Sildenafil kicks in after about 60 minutes after intake and lasts for about 4 hours. Sildenafil soffers the strongest erection but this comes with a sensibility loss. On the other hand, it counteracts premature ejaculation to some degree.

Tadalafil

The effect of Tadalafil lasts 48 hours and kicks in after 45-60 minutes. The erections are little softer compared to sildenafil while the sensibility is better.

Vardenafil

Needs 60 minutes to kick in as well and lasts for 6 hours. The senibility is the best of the three but still reduced.

Side effects

The most common side effects are: headache, stomach upset, back pain, muscle pain, stuffy nose, flushing, or dizziness may occur. In case you notice any side effects not listed here, contact your doctor or pharmacist. Serious allergic reactions to the active agents are rare, but seek immediate medical help if it occurs.

Contraindications

Sildenafil, Tadalafil and Vardenafil are contraindicated for patients who take other pharmaceuticals to treat impotence or using a nitrate drug for chest pain or heart problems. Including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate as this can cause a sudden and serious decrease of blood pressure. Same applies to some recreational drugs such as poppers. These drugs should not be taken by women or children as well as by patients with a known hypersensitivity to any component of the tablet.