
Viagra (Sildenafil)









Description
Viagra Uses and Indications:
Chemical Name SILDENAFIL (sil-DEN-a-fil)
VIAGRA is a prescription medication specifically designed to assist men in maintaining an erection following sexual stimulation. This allows them to continue enjoying intimate moments with their partner in a fulfilling manner. The way it functions is by increasing blood flow to the penis, which promotes enhanced rigidity to an existing erection and facilitates the ability to sustain that level of rigidity over time.
It's crucial to emphasize the term "existing," as taking Viagra will not inherently induce an erection; it solely works to enhance an already present erection. Approved by Health Canada for over-the-counter prescription access, obtaining a prescription from a physician makes it simple to order generic Viagra online with confidence.
Generic Viagra Vs Branded Viagra
Generic Viagra serves as a reliable alternative to branded Viagra for men aiming to address erectile dysfunction challenges. Many reports indicate that generic Viagra possesses nearly identical efficacy levels as its branded counterpart, and its notable appeal lies in its lower price point. It can be easily acquired with the same prescription from your healthcare provider that you would use for the branded Viagra.
The guidelines for use and safety measures that apply to branded Viagra also extend to generic Viagra, giving you reassurance that the availability of generic Viagra indicates it has also received approval from Health Canada.
Fact Table | |
Formula | C22H30N6O4S |
License | US FDA |
Bioavailability | 41% |
Legal status | Rx-Only |
Chemical Name | Sildenafil |
Elimination half-life | 3–4 hours |
Dosage (Strength) | 25mg, 50mg, 100mg |
Pregnancy | Consult Doctor |
Brands | Viagra |
Protein binding | 96% |
PubChem CID | 5212 |
MedlinePlus | a699015 |
ChEBI | 9139 |
ATC code | G04BE03 |
DrugBank | DB00203 |
KEGG | D08514 |
Routes of administration | By mouth |
Directions
The vast majority of men—over 80%—who opt to order Viagra online or fill their prescription at their local pharmacy experience the intended benefits of this medication. This fact holds true not only for branded Viagra but also for those who choose the more cost-effective generic Viagra as an alternative.
It's important to take VIAGRA exactly as prescribed by your healthcare professional. The correct dosage for each individual varies based on their medical condition and personal response to the medication. For optimal results, it’s highly recommended that you take your dose of VIAGRA roughly one hour before you and your partner plan to engage in sexual activity. Swallow the tablet whole, accompanied by a glass of water, and keep in mind that exceeding one dose in a single day is unadvisable, as it significantly heightens the risk of experiencing dangerously low blood pressure.
Additionally, please note that the time needed to observe the effects of VIAGRA can differ significantly from person to person. Generally, it takes anywhere from 30 minutes to an hour for the effects to manifest. This timeline is applicable to generic Viagra as well. Patients may discover that the medication may take longer to become effective after consuming a heavy meal, while VIAGRA tends to act more quickly when taken on an empty stomach.
Ingredients
Viagra Dosage Information
You can take VIAGRA with or without food, as it is flexible regarding meals.
For most patients, the recommended starting dose is 50mg, which should ideally be taken approximately one hour prior to engaging in sexual activity. Some individuals may find it effective to take it just 30 minutes before, while others may prefer to take it as soon as 4 hours prior for optimal results.
Depending on your body's response to the medication, your dosage may be adjusted to 100mg for more potency or reduced to 25mg to lessen intensity, following your doctor’s specific recommendations.
It's crucial to remember that the maximum dosage is limited to once per day. More comprehensive details about the appropriate dosage will be included in the guidance documentation provided with your purchase, whether you choose to order Viagra online or collect your prescription at the pharmacy.
Cautions
Although VIAGRA is effective for many men, it may not be suitable for all individuals. Certain medical conditions can prevent someone from safely taking this medication. It is essential that patients discuss the following medical conditions with their healthcare provider prior to taking either branded or generic Viagra:
- Current use of any nitrate medications
- HIV/AIDS
- History of irregular heartbeat
- Coronary artery disease
- Previous heart attack, stroke, or history of heart-related issues
- High or low blood pressure
- Abnormalities in the penis, such as curvature or congenital defects
- History of bleeding disorders
- Retinitis pigmentosa
- Conditions that might obstruct normal blood flow, including leukemia and sickle cell disease
- Instances of priapism
- Complications relating to cardiovascular or blood diseases
- Severe kidney or liver conditions
It is of utmost importance—under no circumstances should individuals adjust their dosage without prior consultation with their healthcare provider.
Side Effects
While VIAGRA is beneficial for many patients addressing erectile dysfunction, there are potential side effects that users may experience when taking this medication. All medications carry risks of side effects, and Viagra is no exception, even in Canada. Most side effects tend to be minor and temporary; however, some may warrant immediate medical attention. If you feel unwell while taking Viagra, contact your doctor or another trusted healthcare provider promptly.
Common side effects include:
- Facial flushing
- Headaches
- Nasal congestion
- Minor stomach discomfort post-meals
- Visual disturbances (blurred vision, altered color perception, or light sensitivity)
- Bladder pain
- Cloudy or blood-tinged urine
- Dizziness
- Increased urge to urinate or discomfort during urination
- Diarrhea
- Ocular bleeding
- Seizures
- Changes in vision, such as decreased or double vision, and in severe cases, loss of sight
- A bluish tinge to vision
- Prolonged, painful, or inappropriate erection (priapism)
- Redness, burning, or swelling in the eye
- Anxiety or feelings of nervousness
Interactions with other medications can modify the effects of Viagra, so concurrent use of certain other drugs while taking it is generally discouraged. Details concerning potential drug interactions will be provided in the medication guidelines included with your prescription. It is essential to read through these in detail and seek immediate medical consultation if you experience any adverse effects while taking the medication, even if you are not using any other prescribed drugs concurrently.
When utilized correctly, VIAGRA is recognized as a safe and effective treatment for erectile dysfunction in men. Before beginning this medication, ensure you have a detailed discussion with your doctor or healthcare provider to confirm that it is appropriate for your individual health needs.
Dr Conor Sheehy
About Dr. Conor Sheehy (Page Author)
Dr. Sheehy (BSc Molecular Biology, PharmD) is a clinical pharmacist with a strong background specializing in cardiology, oncology, and outpatient care. He holds the designation of board-certified pharmacotherapy specialist (BCPS). His extensive experience collaborating one-on-one with patients to refine their medication and therapy regimens for optimal health outcomes positions him as a valuable subject matter expert in our pharmacy. Read More....
IMPORTANT NOTE: The information provided above serves general awareness and educational purposes only. It is not intended to serve as a diagnosis, treatment, or substitute for professional medical or veterinary advice. Always consult your physician, pharmacist, or veterinarian concerning the safety, suitability, and proper use of any medication for you or your pet.