Managing Expectations from Sildenafil Therapy

202A 8322-130th Street, Surrey, British Columbia, Canada V3W 8J9, 604-543-8711. This pharmacy is duly licensed in the province of British Columbia, Canada by the College of sildenafil tablets lp 100 mg Pharmacists of BC. If you have any questions or concerns you can contact the college at: 200-1765 West 8th Ave Vancouver, BC V6J 5C6 Canada. Disclaimer: This article is for informational purposes only and does not constitute medical advice. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. A summary of Sildenafil’s pharmaceutical identity and competing brands in Canada. Sildenafil is the active ingredient in Canadian brands Viagra® and Revatio®. Viagra® is widely recognized for its role as a PDE5 inhibitor. Revatio® contains the same active component but is marketed for different dosing and indications. Other Canadian brands with the same active ingredient may be available as generics, offering similar pharmaceutical effects. Available Sildenafil formats in Canada for patient use.

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In a lower-dose formulation (marketed as Revatio), sildenafil is also used to treat Pulmonary Arterial Hypertension (PAH), a serious condition involving high blood pressure in the lung arteries, for which it is taken regularly, multiple times a day. Viagra (sildenafil) is a Phosphodiesterase-5 (PDE5) inhibitor that functions as a crucial aid in the natural erection process, specifically requiring sexual stimulation to be effective. When a man is sexually aroused, his body produces cyclic Guanosine Monophosphate (cGMP). This chemical signals the blood vessels in the penis to relax and widen, resulting in increased blood flow and an erection. The PDE5 enzyme is typically present to break down cGMP, thereby terminating the erection.

About Sildenafil

By inhibiting the PDE5 enzyme, sildenafil prevents the rapid degradation of cGMP, thereby prolonging the chemical signal for blood vessel relaxation. This action ensures increased and sustained blood flow to the penile tissues, making it easier to both attain and maintain a firm erection during sexual activity. Take Viagra exactly as prescribed by your doctor, following the instructions in the product monograph in Canada. Consult your doctor for personalized guidance and safe use. The information below summarizes some, but not all, potential side effects, risks, and interactions. In Canada, Sildenafil is available in oral tablet form. Tablets typically come in strengths such as 25 mg, 50 mg, and 100 mg. These tablets are designed for oral administration and are intended to be swallowed whole. Key safety tips for taking Sildenafil properly. Sildenafil tablets should be taken sildenafil citrate tablets for female exactly as prescribed by a healthcare professional. It is important not to exceed the recommended dose. Taking it with or without food is acceptable, but high-fat meals may delay absorption. Always consult a doctor before starting or changing dosage.

How Sildenafil works at the biological level to affect blood flow. Sildenafil blocks the enzyme phosphodiesterase type 5 (PDE5), which leads to increased levels of cyclic guanosine monophosphate (cGMP).

How is Viagra used?

• Other PDE5 Inhibitors (e.g., tadalafil, vardenafil, avanafil): Combining these medications can dangerously amplify their effects, leading to a higher risk of severe side effects like profound low blood pressure and prolonged erection (priapism). • Soluble Guanylate Cyclase (sGC) Stimulators (e.g., riociguat): This combination is strictly contraindicated (must never be used) as it can lead to a dangerously severe drop in blood pressure. The information on this page is sourced from independent third parties contracted by CanadaPharmacyOnline. While we cannot guarantee its medical accuracy, we strongly recommend consulting a healthcare professional for personalized advice regarding medications or medical conditions. Prescriptions Dispensed from Canada are Dispensed by Candrug Pharmacy #18985. This causes relaxation of smooth muscle in blood vessels, allowing improved blood flow. This mechanism is central to how Sildenafil functions pharmacologically. Common and serious reactions reported with Sildenafil use. Common side effects include headache, flushing, indigestion, nasal congestion, and dizziness. Serious side effects are rare but can include sudden vision changes, prolonged erections, or severe allergic reactions.

How Sildenafil Works

Before taking Viagra, it is essential to discuss all possible effects, risks, and interactions with your doctor or pharmacist. Common side effects – The following are common side effects of Viagra; other side effects may also occur. Contact your doctor promptly if any side effects are persistent, worsening, or concerning, or if you experience any other concerning symptoms. • Flushing (redness or warming of the face, neck, or chest) • Vision changes, which can include seeing a slight blue tinge to objects, blurred vision, or increased light sensitivity • Hypotension (low blood pressure), which may cause light-headedness or fainting Serious or rare side effects: These are rare but potentially severe side effects. Seek immediate medical attention or call emergency services if you experience any of the following: • A sudden decrease or loss of hearing, sometimes with ringing in the ears and dizziness.

Prepare For Your Visit

• A sudden decrease or loss of vision in one or both eyes. • Chest pain or other symptoms of a heart attack (like pain spreading to the jaw or shoulder) or stroke, especially during sexual activity. • Priapism: An erection that is painful or lasts for more than four hours. This can cause permanent damage to the penis if not treated right away. • Temporary decreased blood flow to parts of the brain (transient ischemic attack) • Severe Allergic Reaction: Symptoms like swelling of the face, lips, tongue, or throat, or trouble breathing. Any unexpected symptoms should prompt immediate medical attention.

What is Sildenafil?

Provide your doctor with a complete list of all your medications, including prescriptions, over-the-counter drugs, vitamins, and herbal supplements. • Alpha-Blockers (used for high blood pressure or enlarged prostate, e.g., prazosin, doxazosin, tamsulosin): This combination can increase the risk of low blood pressure (hypotension), dizziness, or fainting. Sildenafil should typically be initiated at a low dose after stable alpha-blocker therapy is established. • Antifungals (e.g., ketoconazole, itraconazole): These medications inhibit the enzyme that breaks down sildenafil, leading to increased drug concentration in the body and a higher risk of side effects. • Blood Pressure Medications (other classes, e.g., ACE inhibitors, ARBs, Calcium Channel Blockers): Sildenafil's effect of widening blood vessels may be additive with these drugs, potentially causing a greater drop in blood pressure.

Brand Names

• CYP3A4 Inhibitors (e.g., the antibiotic erythromycin, the HIV medication ritonavir): These potent enzyme inhibitors slow the metabolism of sildenafil, raising its levels in the bloodstream and increasing the risk and severity of side effects. A lower dose of sildenafil is often required. • Grapefruit Juice: This beverage can inhibit the enzyme that processes sildenafil, increasing the drug's concentration in the body and raising the risk of side effects. It is generally advised to avoid or limit consumption. • Nitrates (e.g., nitroglycerin, isosorbide dinitrate, or isosorbide mononitrate, including street drugs known as "poppers"): This combination is strictly contraindicated (must never be used) because it can cause a severe, life-threatening drop in blood pressure. Health Canada warnings and precautions for Sildenafil users. Health Canada advises caution when using Sildenafil in patients with cardiovascular conditions, low blood pressure, or those taking nitrates.

Medical uses

Viagra should not be used under the following conditions: • A known hypersensitivity or allergic reaction to sildenafil or any of its ingredients. • The risk of severe, life-threatening hypotension (dangerously low blood pressure). o Nitrates (e.g., nitroglycerin, isosorbide dinitrate, or isosorbide mononitrate) include: Recreational drugs known as "poppers" (alkyl nitrites). Tell your doctor about your medical conditions, past and present, before starting Viagra. This is crucial because certain conditions can affect whether Viagra is right for you.

Guanylate Cyclase (GC) Stimulators

These conditions may canadian sildenafil citrate include, but are not limited to: • Anatomical deformity of the penis (such as angulation, cavernosal fibrosis, or Peyronie's disease), as this increases the risk of a prolonged erection (priapism). • Any medical conditions that predispose you to priapism, such as leukemia, multiple myeloma, or sickle cell anemia. • Bleeding disorders or an active peptic ulcer. • Cardiovascular disease, including a history of stroke, heart attack, life-threatening irregular heartbeat, or severe heart failure within the last six months • Certain severe eye conditions, such as non-arteritic anterior ischemic optic neuropathy (NAION) or retinitis pigmentosa. • High or low blood pressure that is uncontrolled. It is contraindicated with nitrate medications due to risk of severe hypotension.

• Psychological factors often contribute to erectile dysfunction.
• Sildenafil addresses the physical component but not psychological causes.
• Anxiety, depression, and relationship stress can affect performance.
• Combining medication with sex therapy or counseling can be very effective.
• Open communication with a partner is an important part of treatment.
• Success with medication can sometimes improve psychological confidence.
• A holistic approach to sexual health is often best.

Always disclose your full medical history to your doctor before use.

Substances to avoid or monitor while on Sildenafil. Sildenafil may interact with nitrate medications, alpha-blockers, and certain antifungal or antibiotic drugs. These interactions can affect blood pressure or drug levels, so inform your healthcare provider of all medications and supplements you are taking. How to keep Sildenafil tablets safe and effective. Store Sildenafil tablets at room temperature, between 15°C and 30°C, away from moisture and direct light. Do not use tablets past the expiration date indicated on the packaging. 1• Sildenafil is a PDE5 inhibitor available in Canada as Viagra® and Revatio®. 2• It works by relaxing blood vessels to improve blood flow. 3• Available in oral tablets in 25 mg, 50 mg, and 100 mg strengths.

• Sildenafil is metabolized primarily by the liver enzyme CYP3A4.
• Drugs that inhibit this enzyme can increase sildenafil levels and side effects.
• Examples include some antibiotics, antifungals, and HIV medications.
• Drugs that induce CYP3A4 can decrease sildenafil's effectiveness.
• Always provide your doctor with a complete list of your medications.
• This includes over-the-counter drugs, herbs, and supplements.
• Pharmacists perform interaction checks before dispensing.