Canadian Pharmacy Viagra: Instruction for Use

Viagra Main Aspects

Viagra Composition

Happy with ViagraThe main active substance is sildenafil, released in form of citrate.

Auxiliary agents are:

  • anhydrous calcium hydrophosphate;
  • magnesium stearate;
  • croscarmellose sodium;
  • titanium dioxide (E 171);
  • triacetin;
  • MCC;
  • hypromellose;
  • indigo carmine aluminum lacquer (E 132);
  • lactose.

Viagra Generics Names

Main Viagra generic name is Sildenafil.

Viagra Online Pharmacology

Viagra online restores normal reaction to sexual excitement. The very physiological mechanism providing erection is impossible without nitric oxide release in cavernous body with sexual sensation.

NO (nitric oxide) activates special enzyme called guanylate cyclase, which:

  • increases cGMP level (cyclic guanosine monophosphate);
  • relaxes cavernous body muscles;
  • increases blood flow to genital organ.

Sildenafil, the active ingredient of Viagra, is selective inhibitor of PDE5 (phosphodiesterase type 5), which ensures breaking of cGMP in cavernous body. Canadian Pharmacy Viagra is characterized by peripheral effect on erection. It is noteworthy that sildenafil relaxes cavernous body not directly, but uses relaxing function of nitric oxide. It is known that for useful pharmacological Viagra action, sexual excitement is necessary.

Viagra is well tolerated and in healthy patients at single use in amount not exceeding 100 mg, did not cause clinically significant violations.

Indications for Use

Viagra is prescribed for various types of erectile dysfunction (usually psychogenic, organic or mixed).

Mode of Application

Viagra pills are taken orally, about one hour before planned sexual intercourse. The maximum single Viagra dose for adults is 50 mg once a day. Given individual tolerability and drug effectiveness, Viagra dose can be reduced to 25 mg or increased to 100 mg. 100 mg per day is maximum single Viagra dose.

Elderly people do not need to change standard dosage.

Overdose Caused by Viagra

Studies have shown that in patients with Viagra overdose, side effects were more pronounced. In this case, symptomatic therapy should be used as treatment. Dialysis is not effective because active substance actively and rapidly binds to blood plasma proteins.

Viagra Side Effects

The drug is well tolerated.

In some cases the following Viagra side effects were observed:

  • central nervous system (insomnia, dizziness and increased muscle tone);
  • cardiovascular system (hot flashes, headache, vasodilation);
  • musculoskeletal system (joint and muscle pain);
  • organs of gastrointestinal tract (nausea, diarrhea, dyspepsia);
  • skin (rash);
  • organs of sense (conjunctivitis, impaired vision, increased light perception, change in color perception);
  • respiratory system organs (respiratory disorders, pharyngitis, sinusitis, rhinitis, nasal congestion, respiratory tract infections);
  • genitourinary system (prostate gland disorder, infection of urinary canals).

Other side effects are:

  • flu symptoms;
  • back bain;
  • abdominal pain.

There were rare cases of priapism.

My Canadian Pharmacy Viagra Contraindications

Viagra-Live Full LifeViagra is contraindicated for persons with hypersensitivity to drug components and with anatomical penile deformations (Peyronie’s disease, cavernous fibrosis, angulation).

Also, do not use this medication with the following disorders:

  • increased tendency to bleeding;
  • exacerbation of peptic ulcer of gastrointestinal tract;
  • impaired liver function, especially severe renal failure or cirrhosis;
  • diseases that provoke priapism, including leukemia, myeloma and sickle cell anemia;
  • severe form of hypotension or arterial hypertension;
  • various cardiac diseases, including unstable angina, severe arrhythmia and heart failure.

If patient has experienced stroke or myocardial infarction, then in the next six months Viagra should not be used. Also, Viagra is not assigned to children. The simultaneous use of this drug with nitrates and donators of nitric oxide is strictly forbidden. Men who are contraindicated to have sexual activity should not be prescribed Viagra.

Viagra during Pregnancy

Viagra is not prescribed for women. Reproductive experiments were carried out on rabbits and rats and as a result, there was no observed teratogenic Viagra effect. The fetus developed without abnormalities and irregularities. Morphology and activity of spermatozoa in volunteers with single Viagra dose were also examined. There were no abnormalities as well.

Viagra Interactions with Other Drugs

The intake of erythromycin, cimetidine and ketoconazole is characterized by decrease in clearance and subsequent increase in content of sildenafil in patient’s blood plasma. Viagra together with sodium nitroprusside enhances its anti-platelet effect. Also, when combined with nitrates, Viagra enhances their hypotensive effect. It can even lead to fatal outcome. Also, simultaneous Viagra application with hypoglycemic oral medicines, calcium channel blocking agents and beta-blockers is life-threatening.

Pharmaceutical Form

Viagra is distributed in form of coated pills. Pills are in blister of aluminum foil, which in turn is located in cardboard box.

Storage conditions

Viagra is stored in dry place inaccessible for children. Storage temperature should not exceed 30°C. Shelf life is 2 years. Do not use expired medication.