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Viagra (Sildenafil)

Blue pills for men is a world famous brand for the treatment of erectile dysfunction. Today Viagra can be bought online in pharmacies and on the websites of specialty stores. In addition to worldwide fame and effectiveness, Viagra has a number of contraindications and side effects that you need to remember before taking.

The main active ingredient

Real Viagra contains the active ingredient sildenafilum. Pfizer was involved in its development and research, and then included Viagra in its composition.

Operating principle

Under the influence of stimulating external factors in the vessels of the cavernous bodies of the penis, nitric oxide begins to be produced. This substance triggers a cascade of biochemical reactions that are aimed at relaxing the vascular wall and increasing blood flow. But all these reactions are impossible without another substance – cGMP, which directly interacts with the muscle fibers of the vascular wall cells.

The higher the cGMP level, the stronger the erection will be. The level of cGMP in the corpora cavernosa is significantly influenced by the enzyme PDE-5 that breaks it down. Sildenafilum inhibits PDE-5 and leads to an increase in cGMP levels, thereby creating all the conditions for the development of a full erection.

PDEs of various types are also present in the vascular wall, lungs, retina, heart, brain, and skeletal muscles. The effect of sildenafilum on these forms of the enzyme is weaker than on PDE-5, but it is this fact that determines all the possible side effects from taking it.

Indications

Viagra is indicated for:

Erectile dysfunction of organic or psychological origin;
Pulmonary hypertension.

Contraindications

Viagra is absolutely contraindicated for:

Individual intolerance to vardenafil;
Reception of nitrates, natrate-like products and nitric oxide donors;
Under the age of 16. Act.

Relative contraindications:

Taking antiviral (indavirinum, ritonavirum), antifungal agents (ketoconazolum, itraconazolum), antibiotic erythromycinum;
Taking any drugs with a vasodilating effect (α-blockers (prazosinum, doxazosinum, etc.), Ca2 + channel blockers (nifedipinum, amlodipinum, etc.), ACE inhibitors (lisinoprilum, enalaprilum, etc.), angiotensin receptor blockers (valsartanum, candesartanum, etc.), magnesium sulfate, etc.);
Chronic liver or kidney pathology;
Deformation of the penis, congenital or acquired character;
Diseases of the cardiovascular system;
Hereditary and acquired diseases of the retina;
Tendency to priapism;
Increased risk of bleeding.

Side effects

Taking sildenafilum causes adverse reactions in more than 17% of men. The use of Viagra may be accompanied by:

Pain in the head;
Dizziness;
Redness of the face;
Violation of nasal breathing;
Increased sensitivity to light and color distortion;
Pain in skeletal muscles, back;
Disorders from the digestive system;
Priapism.

Instructions for use

Viagra in the form of tablets for oral administration of 25, 50 or 100 mg is taken once 2 to 3 hours before the expected intimacy. The tablet should not be divided or chewed, it should be washed down with a little water.

Dispersible (soluble in the mouth) 50 mg tablets should be placed under the tongue and dissolve without swallowing or drinking water, 15 to 20 minutes before intercourse.

It is undesirable to take more than one tablet per day. Cannot be combined with other drugs to increase potency, containing PDE-5 inhibitors (vardenafilum, tadalafilum, etc.).

Analogues and substitutes

If you want to buy cheap Viagra online, then be sure to pay attention to its analogues and generics. These drugs are freely available on the Internet and can be ordered to be delivered to your home or nearest point of delivery.

Cialis

Cialis is a branded drug that contains tadalafilum. The medicine is tolerated much easier than Viagra, but costs 1.5 – 2 times more. Cialis generics can be found at normal prices under the names Tadalafil, Dinamico long, Cupid 36, Fremitus, etc.

Levitra

Levitra is another brand that contains vardenafilum. The drug is somewhere between Viagra and Cialis in terms of its safety and cost. Levitra has a variety of cheap Indian generics: Zhewitra, Vilitra, Lovevitra, etc.

Generic Viagra (drugs with sildenafil)

Another way to solve the problem is to buy generic Viagra. These drugs will be significantly cheaper than Viagra itself, and contain sildenafilum. They can be found under the following names: Delgra, Sildigra, Suhagra, Sildenafil, etc.

Can I buy without a prescription

Officially, all drugs registered as medicines, not dietary supplements, should be sold by prescription only. At the same time, if you delve into the topic “Where can I buy cheap Viagra online”, then you can easily find special sites. These can be online pharmacies or online stores that specialize in intimacy products. You can try to contact the generic manufacturer by ordering the drug directly from them.