If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Proper Use
This medicine can cause serious side effects in patients with heart problems. If you experience a prolonged or painful erection for 4 hours or more, contact your doctor immediately. This condition may require prompt medical treatment to prevent serious and permanent damage to your penis. If you experience a sudden loss of vision in one or both eyes, contact your doctor immediately. Check with your doctor right away if you have a sudden decrease in hearing or loss of hearing, which may be accompanied by dizziness and ringing in the ears.
What Is the Maximum Safe Sildenafil Dosage?
If you already use medicine for high blood pressure (hypertension), sildenafil could make your blood pressure go too low. Call your doctor right away if you have blurred vision, confusion, dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly, sweating, or unusual tiredness or weakness. This medicine does not protect you against sexually transmitted diseases (including HIV or AIDS). Use protective measures and ask your doctor if you have any questions about this. Do not take other medicines unless they have been discussed with your doctor. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Kamagra | 100mg | 60 + 4 Pills | 201.34€ 191.75€ | |
| Viagra Generic | 50mg | 30 + 4 Pills | 54.26€ 51.68€ | |
| Kamagra Polo | 100mg | 84 + 4 Pills | 244.49€ 232.85€ | |
| Viagra Generic | 200mg | 360 + 10 Pills | 481.98€ 459.03€ | |
| Kamagra Oral Jelly | 100mg | 63 + 7 Sachets | 224.18€ 213.50€ | |
| Viagra Generic | 25mg | 60 + 4 Pills | 71.99€ 68.56€ | |
| Kamagra Oral Jelly | 100mg | 30 + 5 Sachets | 136.20€ 129.71€ | |
| Kamagra Soft Tabs | 100mg | 12 Pills | 57.55€ 54.81€ | |
| Viagra Generic | 100mg | 10 Pills | 28.91€ 27.53€ | |
| Viagra Generic | 200mg | 120 + 8 Pills | 204.80€ 195.05€ | |
| Viagra Generic | 50mg | 20 Pills | 40.52€ 38.59€ |
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
If you forget to take it
Children 1 year of age and older weighing 20 kg or less—10 mg 3 times a day. Children younger than 1 year of age—Use and dose must be determined by your doctor. For oral dosage forms (suspension or tablets): If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Pregnancy Categories
Keep out of the reach of children. Do not keep outdated medicine or medicine no longer needed. Ask your healthcare professional how you should dispose of any medicine you do not use. Store mixed oral liquid in the refrigerator. Throw away any unused mixed Revatio® oral liquid after 60 days. Rarely, sudden decreased vision, or even permanent blindness, may occur in one or both eyes (NAION). If this serious problem occurs, stop taking sildenafil and get medical help right away.
- Common adverse reactions (≥2%) include headache, flushing, and dyspepsia.
- Nasal congestion, back pain, and myalgia are also frequently reported.
- Diarrhea, dizziness, and rash occur in a smaller percentage of users.
- Visual disturbances (color tinge, blurred vision) are dose-related.
- These effects are usually mild to moderate and transient in nature.
- Serious cardiovascular events are rare but possible, especially in at-risk patients.
- Priapism is a urological emergency that requires immediate treatment.
- Sudden hearing loss, often accompanied by tinnitus and dizziness, is rare.
- Allergic reactions, including skin rash and itching, can occur.
- There have been reports of seizures and anxiety in post-marketing experience.
- Most side effects diminish with continued use or dose adjustment.
You have a slightly greater chance of developing NAION if you have heart disease, diabetes, high cholesterol, certain other eye problems ("crowded disk"), high blood pressure, if you are over 50, or if you smoke.
Overdose/Missed Dose
It is important that you tell all of your doctors that you take sildenafil. If you need emergency medical care for a heart problem, it is important that your doctor knows when you last took sildenafil. Do not use this medicine if you are also using a nitrate medicine, often used to treat angina or high blood pressure. Some illegal ("street") drugs called "poppers" (such as amyl nitrate, butyl nitrate, or nitrite). Do not use this medicine if you also use riociguat (Adempas®).
Less common
If you will be taking this medicine for pulmonary arterial hypertension, your doctor will want to check your progress at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. If you take sildenafil for pulmonary arterial hypertension, do not take Viagra®, Vibrique™ or other PDE5 inhibitors, including tadalafil (Cialis®) or vardenafil (Levitra®). If you take too much sildenafil or take it together with these medicines, the chance for side effects will be higher. It is important to tell your doctor about any heart problems you have now or may have had in the past. Rarely, a sudden decrease or loss of hearing, sometimes with ringing in the ears and dizziness, may occur.
Frequently asked questions
This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements. Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur: burning feeling in the chest or stomach burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings decrease in amount of urine or the frequency of urination dizziness or lightheadedness, especially when getting up suddenly from a lying or sitting position dryness, redness, scaling, or peeling of the skin increase in the size of the pupil redness, burning, or swelling of the eyes redness, itching, or tearing of the eyes seeing shades of colors differently than before swelling of the face, hands, feet, or lower legs unusual feeling of burning or stinging of the skin Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine.
2.4 Dosage Adjustments Due to Drug Interactions
Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them: pain or tenderness around the eyes and cheekbones diarrhea or stomach cramps (severe or continuing) numbness or tingling of the hands, legs, or feet redness, soreness, swelling, or bleeding of the gums sensation of motion, usually whirling, either of one's self or of one's surroundings sexual problems in men (continuing), including failure to experience a sexual orgasm sores in the mouth and on the lips Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088. Stop taking sildenafil and get medical help right away if these effects occur.
| Parameter | Description | Typical Value |
|---|---|---|
| Absorption Time | Time to reach peak plasma levels | 30-120 minutes |
| Half-life | Time for plasma concentration to reduce by half | 4 hours |
| Bioavailability | Percentage of dose that reaches circulation | 40% |
| Metabolism | Mainly processed in the liver | Cytochrome P450 enzymes |
| Excretion | Mainly via feces and urine | - |
Rarely, males may have a painful or prolonged erection lasting 4 or more hours.
- 20mg sildenafil is a standard starting dose for many men.
- Its safety profile is well-established when used responsibly.
- The drug should be taken at least 30 minutes before sexual activity.
- Use caution if you experience dizziness or sudden vision loss.
- Always follow medical advice when using sildenafil for ED.
If this occurs, stop using this drug and get medical help right away, or permanent problems could occur.
6. Adverse Reactions/Side Effects
Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional. Sildenafil is also available in other brands and other strengths for erectile dysfunction-ED in men. Read the Patient Information Leaflet if available from your pharmacist before you start taking sildenafil and each time you get a refill. If you have any questions, ask your doctor or pharmacist. To treat high blood pressure in the lungs, take this medication by mouth with or without food as directed by your doctor, usually 3 times a day.
Sildenafil Uses
The dosage is based on your medical condition, response to treatment, and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Children's dosage is also based on weight. Do not increase your dose or take this drug more often than prescribed. Your condition will not improve any faster, and your risk of side effects will increase. Get medical help right away if you have any very serious side effects, including: increased shortness of breath or trouble breathing A very serious allergic reaction to this drug is rare.
12.2 Pharmacodynamics
Take this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Tell your doctor if your condition does not get better or if it gets worse. Dizziness, lightheadedness, headache, flushing, stomach upset, nosebleeds, trouble sleeping, or swollen hands/ankles/feet (edema) may occur. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may also occur. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: itching/swelling (especially of the face/tongue/throat) This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
| Aspect | Details | Notes |
|---|---|---|
| Active Ingredient | Sildenafil citrate | Used for erectile dysfunction |
| Dosage Strength | 20 mg per tablet | Common dosage for initial treatments |
| Recommended Use | Oral administration | Taken with water before sexual activity |
| Availability | Over-the-counter in some countries | Prescription required in others |
| Onset of Action | Typically 30-60 minutes | Varies by individual |
You may report side effects to FDA at 1-800-FDA-1088 or at In Canada - Call your doctor for medical advice about side effects.
- Comparing 20mg sildenafil to other PDE5 inhibitors highlights differences.
- Tadalafil (Cialis) has a longer duration of action (up to 36 hours).
- Vardenafil (Levitra) has a similar duration to sildenafil but may be less affected by food.
- Avanafil (Stendra) has a faster onset of action (15-30 minutes).
- The choice of drug depends on individual patient needs and response.
- Tadalafil is also approved for daily use at a lower dose (2.5mg, 5mg).
- Side effect profiles are similar but can vary in frequency between individuals.
- Cost and insurance coverage often play a significant role in the choice.
- Some patients may respond better to one medication over another.
- A doctor can help determine the most appropriate medication and dose.
- It may take trial and error to find the optimal treatment.
You may report side effects to Health Canada at 1-866-234-2345.
8.5 Geriatric Use
If you can't find what you were looking for, please contact us using one of the methods below so we can better serve you. Due to the Coronavirus (COVID-19) outbreak worldwide, the global demand for some Personal Protective Equipment (PPE) is exceeding current supply availability. In addition, the manufacturing of the PPE and many other wound care/infection prevention products have been impacted by the global response to the Coronavirus. While you may see product availability reduction in the near-term, please be assured that we at McGuff Medical are continuing to work diligently to ensure an uninterrupted supply of products and alternative products to you. Additionally, in order to ensure healthcare providers have access to the PPEs they need, the McGuff Company is temporarily limiting PPEs to healthcare providers.
Revatio for Oral Suspension
As always, please feel free to reach out to our McGuff Customer Service team with any questions that you may have. Generic name:Sildenafil 20 mg (lungs) - oral Generic name:Sildenafil 20 mg (lungs) - oral Sildenafil is used to treat high blood pressure in the lungs (pulmonary hypertension). It works by relaxing sildenafil 100g and widening the blood vessels in your lungs which allows the blood to flow more easily. Decreasing high blood pressure in the lungs allows your heart and lungs to work better and improves your ability to exercise. This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional.
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