Viagra from Canadian Pharmacy: In-Depth Details about The Main Popular ED Drug

Your Viagra Instruction for UseTable of Contents

  1. What is Viagra?
  2. How Does Generic Viagra Work?
  3. What is Viagra Used for?
  4. Contraindications
  5. Viagra Dosage
  6. Interreactions of Canadian Viagra
  7. Viagra Side Effects
  8. Viagra Overdose
  9. Generic Viagra Online Interactions
  10. Viagra Generic Name

What is Viagra?

Viagra for men is the world’s first oral pharmaceutical product, which is recognized effective for most men having problems with erection.

How Does Generic Viagra Work?

The main mechanism of this ED drug action is a significant magnification in blood flow to the penis, which makes a contribution to natural erection appearance. Canadian Pharmacy Generic Viagra has a positive effect only on natural mechanisms of erection – this is its novelty and secret of incredible popularity.

This medication is not a general stimulant that increases male libido and does not cause the appearance of sexual desire as such – action of “magic” tablets is based only on local magnification in blood flow to the penile cavernous body, which encourages to erection appearance.

What is Viagra Used for?

Viagra is used for erectile dysfunction curing manifested by an inability to reach or keep erection enough to a sexual intercourse with appropriate final – ejaculation. Viagra pills are efficient only in case of sexual stimulation. The active ingredient in Viagra is sildenafil citrate available in dosage 25, 50 and 100 mg. Before 100mg Viagra implementation, you’d better consult a doctor to determine whether this dosage is suitable for you.

Contraindications

Online pharmacy Viagra is used in people undergoing long-lasting or circulating nitric oxide donators, organic nitrates or nitrites in any form because Viagra improves the hypotensive effect of this exact medications. While admission to Sildenafil do not apply with other drugs to treat erectile dysfunction.
Viagra Contraindications_

  • children and adolescents under 18;
  • women;
  • hypersensitivity to sildenafil or to any component of the drug.

Canadian Pharmacy Viagra should be utilized with caution in case of the following list of disorders:

  • penile anatomical traumas (angulation, cavernous fibrosis or Peyronie’s disease);
  • predisposition to priapism (such as sickle cell anemia, multiple myeloma, leukemia, thrombocytopenia);
  • predisposition to hemorrhages;
  • stomach and duodenum peptic ulcer exacerbation;
  • pigment retinitis of the hereditary base;
  • cardiac failure;
  • uncontrolled angina pectoris;
  • the last 6 months myocardial infarction;
  • blood stroke;
  • severe life-threatening arrhythmias;
  • increased or decreased arterial blood pressure.

Viagra Dosage

Viagra is taken orally. For most patients, Viagra recommended dose is 50 mg, approximately 1 hour before sexual intercourse. Regarding effectiveness and tolerability, the dose can be level up to 100 mg or down to 25 mg. The maximum recommended dose is 100 mg. The maximum recommended frequency of application is 1 time/day. In elderly patients, dose adjustment is not required.

There is a common question for how long does viagra work. The answer is simple, you will observe Viagra effect for up to 5 hours. Of course, the effect is not so long-lasting but the pioneer in this sphere, Viagra online Canada has gained the reputation among men with sexual problems.

Interreactions of Canadian Viagra

  • When jointly used with ritonavir, maximum single Viagra dose should not be over 25 mg, intake frequency – once every 48 hours.
  • When jointly used with inhibitors of erythromycin, saquinavir, ketoconazole, itraconazole, starting Viagra dosage should be 25 mg and no more.
  • Not to put at risk postural hypotension when applying alpha-blockers, it is necessary to start taking Viagra only after hemodynamics’ stabilization in these patients has been observed.

Viagra Side Effects

ViagraThe most commonly observed Viagra side effects were a headache and “flashes”. Such adverse reactions are usually mild or moderate and disappear by themselves. Clinical trials when a fixed Viagra dosage was used have exhibited that certain side effects frequency enhance when doses are increased.

Visual Organs:

  • often – blurry vision, visual disorders, cyanopsia;
  • infrequently – eyes pain, photophobia, photopsia, chromatic vision, reddening of eyes / ocular injection, change in light perception brightness, mydriasis, conjunctivitis, eye hemorrhage, cataracts, lacrimal apparatus malfunction;
  • rarely – eyelids and adjacent tissues edema, dry eyes, rainbow vision, increased eye fatigue, vision of objects in yellow color (xanthopsia), vision of objects in red (erythropsia), conjunctival hyperemia, conjunctival irritation, discomfort in eyes;
  • frequency unknown – non-arteritic anterior ischaemic optic neuropathy, retinal vein occlusion, retinal vein occlusion, diplopia, temporary loss of vision or visual acuity, increased intraocular pressure, retinal edema, retinal vascular disease, vitreous detachment / vitreous traction.

Hearing Organs: infrequent – sudden decrease or loss of hearing, tinnitus, ears pain.

Cardiovascular System:

  • often – “hot flashes”;
  • infrequent – tachycardia, palpitations, decreased blood pressure, increased heart rate, unstable angina, AV-blockade, myocardial ischemia, cerebral vascular thrombosis, cardiac arrest, cardiac failure, abnormalities in ECG, cardiomyopathy;
  • rarely – atrial fibrillation.

Hematopoiesis System: infrequently – anemia, leukopenia.

Metabolism and Nutrition: infrequently – thirst, swelling, gout, poorly controlled diabetes, hyperglycemia, peripheral edema, hyperuricemia, hypoglycemia, hypernatremia.

Respiratory System:

  • often – stuffiness in nose;
  • infrequently – nasal hemorrhage, rhinitis, asthma, short breathing, sore throat, pharyngitis, sinusitis, bronchitis, leveled up sputum volume, coughing;
  • rarely – throat tightness, nasal cavity mucous membrane dryness, nasal mucosa swelling.

Digestive System:

  • often – nausea, indigestion;
  • infrequently – gastroesophageal reflux disease, vomiting, abdominal pain, dry mouth, tongue inflammation, gum inflammation, colitis, deglutitive problem, gastritis, gastroenteritis, esophagitis, stomatitis, deviation of liver function tests from normal, rectal bleeding;
  • rarely – hypoaesthesia oral.

Musculoskeletal System:

  • often – back pain;
  • infrequently – myalgia, extremities pain, arthritis, arthrosis, ligament rupture, peritendinitis, bone pain, myasthenia gravis.

Genitourinary System:

  • infrequently – cystitis, nocturia, breast enlargement, urinary incontinence, hematuria, ejaculatory disorder, genitals edema, anorgasmia, hematospermia, penile tissues damage;
  • rarely – prolonged erection and/or priapism.

Central and Peripheral Nervous System:

  • very often – headache;
  • often – dizziness;
  • infrequently – drowsiness, migraine, ataxia, hypertonus, neuralgia, neuropathy, paresthesia, tremor, faintness, depression, sleeplessness, unusual dreams, increased reflexes, hypoesthesia;
  • rarely – convulsions with repeated cases, fainting.

Skin and Subcutaneous Tissues:

  • infrequently – skin rash, hives, herpes simplex, intense itching, sweating, skin ulceration, contact dermatitis, exfoliative dermatitis;
  • frequency is unknown – Stevens-Johnson syndrome, toxic epidermal necrolysis.

Other:

  • infrequent – fever, facial swelling, photosensitivity reactions, shock, asthenia, fatigue, pain of different locations, chills, accidental falls, chest pain, accidental trauma;
  • rarely – irritability.

Viagra Overdose

With a single Viagra dose up to 800 mg, adverse reactions were comparable to those of sildenafil at lower doses but were more common.

In case of Viagra overdose, it is demanded to carry out symptomatic therapy. Hemodialysis does not accelerate sildenafil clearance because the latter actively combines with plasma proteins and is not excreted through urine.

Generic Viagra Online Interactions

  • Sildenafil (Viagra ingredient) exchange takes place basically through liver been the influence CYP3A4 and CYP2C9 isoenzymes, thereby these isoenzymes inhibitory substance can decrease sildenafil clarification, and inductors, respectively, magnify its clarification.
  • With simultaneous administration with CYP3A4 inhibitors, there observed a reduction in sildenafil clarification.
  • Cimetidine (800 mg) in combination with sildenafil (50 mg), which is a nonspecific inhibitor of CYP3A4, becomes causes of amplification in sildenafil concentration in plasma by 56%.
  • Sildenafil 100 mg unit dose taken at one and the same time with erythromycin, the concentration of the latter in blood achieves a constant rate, increasing sildenafil AUC by 182%.
  • More potent inhibitors of the CYP3A4 isoenzyme, such as ketoconazole or itraconazole, are able to provoke more expressed alterations in Sildenafil pharmacokinetics.
  • When sildenafil (once in a dose of 100 mg) is applied at one and the same time with ritonavir (500 mg 2 times/day), ritonavir concentration in blood causes amplification in Cmax sildenafil by 300 % (4 times), and AUC by 1000% (11 times).
  • Magnesium hydroxide / Aluminum hydroxide single application does not have any influence on sildenafil bioavailability.
  • Azithromycin application in a dosage of 500 mg/day for 3 days does not affect Sildenafil concentration in blood.

Viagra Generic Name

generic Viagra
The main name of Viagra generic is Sildenafil, a preparation named after the main its main component. Generic Viagra is an exclusive analog of the famous brand drug, produced by means of similar technology and composition. At the same time, unlike original medication, generic Viagra is different in lower price, which makes the drug affordable for every man.

How long does Sildenafil Work?

Generic Viagra starts performing within 30 to 60 minutes after taking. After effective relaxation of penile blood vessels, men again gain an opportunity to achieve a full natural erection increasing self-confidence. The active ingredient Sildenafil provokes an increased blood supply to genitals, as a result of which a quality persistent erection lasts much longer. The total duration of Sildenafil effect, which can be bought in Canadian Pharmacy, is up to 5 hours.