Description
Fildena 25 Mg is a sildenafil citrate tablet. This drug comes under the class of phosphodiesterase type 5 inhibitors. Sildenafil is mostly administered to adult men suffering from erectile dysfunction, i.e. the inability to get or maintain an erection. It may also be used in various medical settings with alternative dose regimens, such as for pulmonary arterial hypertension, but only under the direction of a health care provider. In Canada, medications containing sildenafil are prescription goods and should be taken under the supervision of a licensed doctor. This page contains general medical information on Fildena 25 Mg including uses, dosage information, side effects, precautions, safety information and more.What is Fildena 25 Mg?
Fildena 25 milligrams includes 25 milligrams of sildenafil citrate as Oral Tablet. Sildenafil is part of a series of drugs called PDE5 inhibitors. These drugs work by affecting the relaxation of blood vessels, via a chemical route that is important in the function of smooth muscle and blood flow. In healthcare, sildenafil is most commonly associated with the treatment of erectile dysfunction in adult men. It does not create sexual desire and does not work without sexual stimulation. Its role is to help improve the body’s natural erectile response when the underlying medical situation is appropriate. For Canadian use, patients should make sure any sildenafil product is dispensed through a licensed Canadian pharmacy and prescribed by a qualified healthcare professional. Health Canada lists authorized sildenafil products in its Drug Product Database, and prescription status should be checked before use.How Sildenafil Citrate Works
Sildenafil citrate inhibits phosphodiesterase type 5, the enzyme responsible for the breakdown of cyclic guanosine monophosphate. Cyclic guanosine monophosphate causes relaxation of smooth muscle and dilation of certain blood arteries. Penile tissue releases nitric oxide on sexual stimulation. This leads to the synthesis of cyclic guanosine monophosphate, which increases the blood flow into the penis. Sildenafil works by reducing the breakdown of this molecule, which helps to support an erection in persons with erectile dysfunction. Sildenafil is not a hormone, stimulant or aphrodisiac. It does not provide a lasting solution for erectile dysfunction and does not guard against sexually transmitted infections. It is effective only if medically suitable, with sexual excitement, correct use and no hazardous drug combinations.Medical Uses of Fildena 25 Mg
- Erectile dysfunction: Sildenafil is used to help adult men who have difficulty achieving or maintaining an erection sufficient for sexual activity.
- Pulmonary arterial hypertension: Sildenafil may be used for pulmonary arterial hypertension under different prescribing conditions, strengths, and treatment schedules. This use must be managed by a specialist.
- Doctor-directed vascular conditions: In selected cases, PDE5 inhibitors may be considered by clinicians for specific blood-flow-related conditions, but this is not a self-treatment use and should not be assumed for Fildena 25 Mg.
Who Should Not Use This Medicine
Fildena 25 Mg is not suitable for everyone. A healthcare professional should review your medical history, current medicines, heart health, blood pressure, and risk factors before prescribing sildenafil.Do NOT use if you have:
- A prescription for nitrate medicines, including nitroglycerin sprays, tablets, patches, or isosorbide medicines
- Use of recreational “poppers” containing amyl nitrite or similar nitrate substances
- Severe heart disease where sexual activity is medically unsafe
- Recent heart attack, stroke, or serious rhythm problem unless cleared by a doctor
- Very low blood pressure or uncontrolled high blood pressure
- Severe liver disease unless specifically assessed by a prescriber
- A previous episode of non-arteritic anterior ischemic optic neuropathy
- Known allergy to sildenafil citrate or any tablet ingredient
- Been advised by a doctor to avoid sexual activity for cardiovascular reasons
Dosage and Administration
Fildena 25 Mg is taken by mouth as a tablet. Dosage must be individualized by a healthcare professional. The 25 mg strength may be selected when a lower dose is considered appropriate, such as for patients who may be more sensitive to sildenafil or who have certain medical risk factors. Sildenafil is usually taken before sexual activity and not on a daily basis unless your doctor has told you to do so. It should not be used more than the specified amount. Taking more tablets may raise the risk of low blood pressure, fainting, prolonged erection, headache, dizziness and vision-related problems. Patients should not alter the dose without medical advice. In Canada, sildenafil should only be used with a valid prescription and provided by a licensed pharmacist.Important dosage tips
- Timing: Sildenafil is commonly taken before sexual activity, but exact timing should follow the prescription label.
- Missed dose: If used only as needed for erectile dysfunction, there is usually no missed-dose schedule. Do not double the dose.
- Food: A heavy or high-fat meal may delay how quickly sildenafil begins to work in some people.
- Alcohol: Alcohol can worsen dizziness, flushing, low blood pressure, and erection difficulty.
- Do not combine: Do not take sildenafil with other PDE5 inhibitors such as tadalafil or vardenafil unless specifically instructed by a doctor.
Side Effects
Common side effects
Common side effects are usually related to blood vessel relaxation and may include:- Headache
- Facial flushing
- Stuffy or runny nose
- Indigestion or stomach discomfort
- Dizziness
- Nausea
- Back pain or muscle aches
- Mild visual changes, such as light sensitivity or blue-tinted vision
Serious side effects
Seek urgent medical help if you experience:- Chest pain, pressure, or pain spreading to the arm, jaw, or back
- Sudden vision loss in one or both eyes
- Sudden hearing loss or ringing in the ears
- Fainting or severe dizziness
- Irregular heartbeat
- Severe allergic reaction, swelling, rash, or breathing difficulty
- An erection lasting longer than 4 hours
- Severe drop in blood pressure
Warnings and Precautions
Pregnancy and breastfeeding: Fildena 25 Mg is generally used for erectile dysfunction in adult men. It is not intended for use in women for ED. Sildenafil may be used in other medical settings, but pregnancy or breastfeeding use requires specialist medical supervision. Alcohol interaction: Alcohol may induce dizziness and decrease blood pressure. It can also aggravate erectile dysfunction, which means treatment may be less consistent. Heart and Blood Pressure Warning: Do not use Sildenafil if you have heart disease, angina, heart failure, irregular heartbeat, a recent stroke or heart attack unless your doctor tells you it is safe. Long term use risks: If used long term should be supervised by a healthcare expert. Chronic erectile dysfunction may be related to diabetes, high blood pressure, cardiovascular disease, obesity, hormonal changes, stress, anxiety or side effects of medication. Older adults: Older patients may be more susceptible to the blood pressure effects and may require careful selection of dose. Liver or kidney impairment: Dose adjustments may be needed in people with significant liver or kidney problems. Some Canadian product monographs note that a lower starting dose may be considered in severe renal or hepatic impairment.Drug Interactions
Sildenafil can interact with several medicines and substances. Tell your doctor and pharmacist about all prescription drugs, over-the-counter medicines, and supplements you use. Important interactions include:- Nitrates: Nitroglycerin, isosorbide dinitrate, isosorbide mononitrate
- Riociguat: Used for certain pulmonary hypertension conditions
- Alpha blockers: Such as doxazosin, tamsulosin, terazosin, or alfuzosin
- Blood pressure medicines: May increase dizziness or low blood pressure risk
- Other PDE5 inhibitors: Tadalafil, vardenafil, avanafil, or other sildenafil products
- Strong CYP3A4 inhibitors: Some antifungals, antibiotics, HIV protease inhibitors, and other medicines
- Grapefruit products: May affect sildenafil levels in the body
- Recreational substances: Nitrate-containing “poppers” are unsafe with sildenafil
Storage Instructions
Store Fildena 25 Mg tablets at room temperature as directed on the product packaging. Keep tablets away from excessive heat, moisture, and direct light. Do not store medicine in a bathroom where humidity is high. Keep this medicine out of reach of children and pets. Do not use tablets after the expiry date. Expired or unused medicine should be returned to a pharmacy for safe disposal where available. Do not flush tablets unless a pharmacist or local disposal program instructs you to do so.Sildenafil has clinical relevance because erectile dysfunction can be both a quality-of-life condition and a possible marker of underlying vascular disease. Doctors may prescribe sildenafil when a patient has ED and is medically suitable for PDE5 inhibitor therapy.
A lower 25 mg strength may be useful when a clinician wants a more cautious starting point or when a patient has factors that may increase sensitivity to the drug. However, the correct dose depends on the patient’s age, cardiovascular status, liver and kidney function, current medicines, and treatment response.
In Canada, prescription oversight is especially important because ED medicines can interact with heart medications and can be risky when sourced from unverified online sellers. Patients should avoid using sildenafil products that do not have appropriate Canadian authorization or that are not dispensed by a licensed pharmacy.
This content is for informational purposes only and does not replace professional medical advice. Always consult a healthcare professional before using any medication.
Is Fildena 25 Mg safe for long-term use?
It may be used longer term only when prescribed and monitored by a healthcare professional. Ongoing ED should be medically assessed because it may be linked to cardiovascular disease, diabetes, blood pressure problems, or hormonal factors.
How long does Fildena 25 Mg take to work?
Sildenafil is usually taken before sexual activity, but the exact timing can vary by patient, meal timing, and medical condition. Follow the directions on your prescription label.
Can I take Fildena 25 Mg every day?
Do not take it daily unless your doctor specifically tells you to. For erectile dysfunction, sildenafil is often used as needed, but your prescriber will decide the safest schedule.
What happens if I miss a dose?
If you take it as needed for erectile dysfunction, there is usually no missed dose. Do not take an extra tablet to make up for a missed or delayed dose.
Is Fildena 25 Mg safe during pregnancy?
This product is not intended for treating erectile dysfunction in women. Sildenafil use during pregnancy for other medical conditions requires specialist supervision and should not be self-administered.
Can I drink alcohol with Fildena 25 Mg?
Alcohol may increase dizziness, flushing, and low blood pressure. It may also make erectile dysfunction worse. Ask your doctor what level of alcohol, if any, is safe for you.
Can I stop sildenafil suddenly?
If used as needed for ED, stopping usually does not cause withdrawal. However, if sildenafil is being used for another condition such as pulmonary arterial hypertension, do not stop without medical advice.
Is Fildena 25 Mg available without prescription in Canada?
Sildenafil products are prescription medicines in Canada. Patients should use them only after assessment by a licensed healthcare professional and through a licensed pharmacy.






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