In recent years, the world market of medicines has produced a huge number of various products that stimulate male sexual power. They include herbal preparations – phytopreparations, dietary supplements or biologically active additive, and drugs that are synthesized chemically: Viagra, Cialis, Levitra and others. These drugs are very effective treatments for erectile dysfunction. All of them can be purchased in pharmacies, including online pharmacies like Canadian Family Pharmacy.
Let’s try to review these drugs for impotence (erectile dysfunction) in more detail. In this article we will talk about tablets synthesized synthetically.
Viagra
Viagra appeared on the pharmaceutical market in 1998. International (non-proprietary) name: “Sildenafil” (Sildenafil citrate). Viagra is the first representative of a new group of drugs, which are called inhibitors of phosphodiesterase type 5 (PDE5 inhibitors).
The drug dilates the blood vessels of the penis (with adequate sexual stimulation). As a result, blood flow in the penis increases, and a man can achieve a normal erection.
The active substance of Viagra is Sildenafil. One tablet contains 25 mg, 50 mg or 100 mg of Sildenafil. Canadian Family Pharmacy also offers other dosages. Viagra includes the following inactive components: microcrystalline cellulose, calcium hydrogen phosphate, croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide, lactose, triacetin, indigo carmine aluminum lacquer.
Viagra is designed to treat erectile disorders. In this condition, men do not have a normal erection, necessary for sexual intercourse. Viagra acts only in response to sexual arousal and does not affect reproductive function.
Contraindications
Do not take Viagra if:
- you have ever had an allergic reaction to Viagra (an allergic reaction may manifest as a rash, itching, swelling of the face or lips, shortness of breath, anaphylactic shock). If you have had these symptoms, tell your doctor about it;
- you take drugs containing nitrates or donators of nitric oxide for the treatment of angina pectoris (Nitroglycerin, etc.). If you are taking such medications, tell your doctor about it.
Warnings:
If you suffer from any of the following conditions, you should inform your doctor before taking Viagra:
- sickle-cell anemia (changes in red blood cells);
- leukemia (blood cancer);
- multiple myeloma (bone marrow cancer);
- disease or deformation of the penis;
- you undergo a course of treatment with drugs that cause erectile dysfunction (in this situation, special precautions may be required);
- a rare eye disease, called retinitis pigmentosa;
- a stomach ulcer and 12 duodenal ulcer;
- bleeding (eg, hemophilia).
Important:
- Canadian Pharmacy Viagra can not be used in combination with other drugs designed to treat erectile dysfunction;
- Viagra should not be given to children under 18 years of age;
- Do not use the drug if you have diseases of the kidney or liver;
- Find out the interaction with other medicinal products (tell the doctor about all the drugs that you take, because Viagra can interact with certain medicines);
- Viagra can cause undesirable effects when combined with other drugs called nitric oxide donators or nitrates (they are used in the treatment of angina pectoris). If you use such drugs, do not use Viagra!
- The doctor will decide at what dose you should take Viagra. The recommended Viagra dosage is 50 mg, but the dose can either increased to 100 mg, or reduced to 25 mg depending on the effectiveness and tolerability of the drug;
- Do not take the pill at a higher dosage than your doctor recommended. Do not take more than one pill per day. If you take more pills than you were recommended, consult a doctor immediately;
- Canadian Pharmacy Viagra should be taken 30 minutes – 1 hour before sexual intercourse. Swallow the whole tablet and drink a little water. Viagra causes an erection only if there is adequate sexual stimulation or sexual arousal. Spontaneous erection without stimulation will not occur;
- The action of Viagra usually starts 30 minutes after administration and lasts 4-6 hours. After fatty foods, the action of Viagra can start later. Alcohol can intensify side effects of Viagra, so it is NOT recommended to drink alcoholic beverages;
- If Viagra does not cause an erection or an erection is not lasting, you should see a doctor;
- Like most other medicines, Viagra can cause some adverse reactions (side effects). The most common side effects are headache and hot flashes to the face. Less common side effects are digestive disorders, dizziness, nasal congestion and changes in eyesight (changes in the color of the objects). If you experience any above side effects, contact your doctor.
Cialis
Cialis (Tadalafil) has been widely used to treat erectile dysfunction. The drug appeared on the pharmaceutical market in 2003.
The mechanism of Cialis action is similar to Viagra.
Data on the pharmacogenetics of the drug testify in favor of Cialis. So, the half-life of Viagra is 3-5 hours (depending on the dose), and Cialis – 17.5 hours; Viagra lasts 4-6 hours, Cialis – about 36 hours (based on the research of Cialis 20 mg from Canadian Family Pharmacy).
Side effects of Viagra and Cialis are also similar: dizziness, headache, diarrhea, nausea, flu symptoms (nasal congestion), hot flushes, headaches, back pain, stomach ache, disturbed color vision.
Indications and contraindications are the same. Cialis should be prescribed by a doctor.
Levitra
At the moment, Levitra (Vardenafil) is one of the latest drugs on the pharmacological market. Clinical trials have proved that Vardenafil had a positive effect on 80% of the men with erectile dysfunction, regardless of age.
At the annual meeting of the Sexual Medicine Society of North America, the manufacturer presented the results of another clinical trial, according to which the efficacy of the drug reached 85%. This is higher than the corresponding index of the Viagra. Viagra works in 82% of cases.
Levitra challenges Viagra, the first tablets for the treatment of impotence, which appeared on the market in 1998. Perhaps Canadian Pharmacy Levitra will compete with Cialis. The action of all three drugs for good erection is based on blocking the enzyme phosphodiesterase type 5, and all these drugs require sexual stimulation. However, previous clinical trials have shown that Cialis and Levitra drugs act faster and have fewer side effects than their Viagra competitor.