It is very important not to take Viagra more than once a day, as exceeding this frequency increases the risk of serious side effects, including vision loss and significant drops in blood pressure. Viagra® (sildenafil citrate), a phosphodiesterase type 5 (PDE5) inhibitor, is an oral medication used to treat erectile dysfunction (ED). Viagra (sildenafil citrate) is indicated to treat: Viagra (sildenafil citrate) is indicated to treat: Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Comes in 25 mg, 50 mg, and 100 mg tablets Comes in 25 mg, 50 mg, and 100 mg tablets Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Comes in 25 mg, 50 mg, and 100 mg tablets Comes in 25 mg, 50 mg, and 100 mg tablets Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Known hypersensitivity to sildenafil or any component of tablet Known hypersensitivity to sildenafil or any component of tablet Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Known hypersensitivity to sildenafil or any component of tablet Known hypersensitivity to sildenafil or any component of tablet Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures *This information is from the label for brand name Viagra®. See the Full Prescribing Information for more complete information. Sildenafil, the active ingredient in Viagra, may also be the active ingredient in other medications, and this information may not be accurate for all medications that include the active ingredient sildenafil.
4. What and when you eat can impair the effectiveness of Viagra®.
Another brand of sildenafil is Revatio, which is used to treat pulmonary hypertension. Viagra was initially researched by Pfizer as a treatment for high blood pressure and angina. However, during clinical trials, scientists discovered that the drug had the side effect of increasing penile rigidity. Pfizer recognized that erectile dysfunction was a physiological condition without an effective treatment india viagra and that developing a drug for this indication could bring significant benefits to the company. For this reason, Viagra was redirected for research and development to assist with male impotence.
Can Viagra cause side effects?
The introduction of Viagra has brought happiness to many families and has alleviated a sensitive issue for a segment of men in modern society. Viagra is a medication that belongs to the group of PDE5 inhibitors. PDE5 is an enzyme that promotes the degradation of cGMP in the blood, and cGMP regulates blood flow in the penis. By inhibiting PDE5, Viagra helps relax smooth muscle and increase blood flow to the penis, supporting the ability to achieve an erection. Note: Simply taking Viagra does not create an erection!
Dosage Modifications
Although it is highly effective in maintaining an erection, Viagra will not work if the body is not stimulated and aroused. Viagra is formulated in the form of film-coated tablets, with dosages ranging from 25 to 100 mg. The usual dose is 50 mg; however, it can be increased or decreased depending on the response (note: this dosage of Viagra differs from the dosage used to treat pulmonary hypertension with the brand Revatio, which is typically 20 mg three times a day). Viagra can be taken regardless of meals. Taking Viagra with food may reduce gastrointestinal side effects but will prolong the time for the drug to take effect. *This information is from the label for brand name Viagra®. The information provided here is NOT MEDICAL ADVICE and is for informational and educational purposes only.
| Metric | Description | Typical Result |
|---|---|---|
| Time to erection | Time from tablet intake to erection achievement | 30–60 minutes |
| Duration of effect | Time sildenafil maintains efficacy | Up to 4–6 hours |
| Satisfaction rate | Percentage of users reporting satisfactory sex | Approx. 70–80% |
| Onset variability | Differences based on food, age, health | Faster on empty stomach, slower after heavy meals |
The drug comparison tool does not determine eligibility for medications or treatments provided via the Hims/Hers platform. Consultation with a healthcare provider is required to assess suitability for any medical treatment based on individual health and medical history. All product names and associated trademarks are the property of their respective owners. Article by Pharmacist Duong Thu Huong - Vinmec Times City International General Hospital Viagra is a medication that belongs to the group of PDE5 inhibitors. PDE5 is an enzyme that promotes the degradation of cGMP in the blood, and cGMP regulates the blood flow in the penis. Therefore, a decrease in cGMP makes it difficult for men to achieve an erection. Viagra primarily affects the circulatory and reproductive systems. Viagra (active ingredient: Sildenafil) is a distinctive blue-green, diamond-shaped tablet that has been approved by the FDA for the treatment of erectile dysfunction.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Professional | 100mg | 90 + 2 Pills | 207.09€ 197.23€ | |
| Viagra Generic | 50mg | 180 + 8 Pills | 158.82€ 151.26€ | |
| Viagra Oral Jelly | 100mg | 10 Sachets | 46.36€ 44.15€ | |
| Viagra Generic | 150mg | 20 Pills | 55.02€ 52.40€ | |
| Viagra Soft Tabs | 100mg | 20 Pills | 62.99€ 59.99€ | |
| Viagra Soft Tabs | 100mg | 90 + 6 Pills | 205.31€ 195.53€ | |
| Viagra Generic | 200mg | 120 + 8 Pills | 204.80€ 195.05€ | |
| Viagra Original | 100mg | 48 + 4 Pills | 207.15€ 197.29€ | |
| Viagra Generic | 150mg | 60 + 4 Pills | 111.25€ 105.95€ | |
| Viagra Super Active | 100mg | 90 + 10 Pills | 165.61€ 157.72€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ | |
| Viagra Generic | 25mg | 30 + 4 Pills | 47.97€ 45.69€ | |
| Viagra Generic | 200mg | 360 + 10 Pills | 481.98€ 459.03€ |
Another brand of sildenafil is Revatio, which is used to treat pulmonary hypertension.
| Form | Strengths | Packaging | Administration Notes |
|---|---|---|---|
| Tablets | 25 mg, 50 mg, 100 mg | Blister packs of 4–10 tablets | Take orally before sexual activity, on empty stomach preferred |
| Orally disintegrating tablets | 50 mg | Blister pack, single dose | Dissolve on tongue before intercourse |
| Liquid form | Customizable | Bottles with droppers | For patients unable to swallow pills |
Viagra was initially researched by Pfizer as a treatment for high blood pressure and angina. However, during clinical trials, scientists discovered that the drug had the side effect of increasing penile rigidity. Pfizer recognized that erectile dysfunction was a physiological condition without an effective treatment india viagra and that developing a drug for this indication could bring significant benefits to the company. For this reason, Viagra was redirected for research and development to assist with male impotence.
What side effects can this medication cause?
It is recommended to take Viagra 1 hour before sexual intercourse, as it is quickly absorbed into the bloodstream and reaches peak levels within 1 hour. Do not take more than one tablet per day. Viagra primarily affects the circulatory and reproductive systems: Effects on the circulatory system: Viagra can lower blood pressure, especially 1-2 hours after taking the medication. If you are taking blood pressure medication, consult your doctor before using Viagra. Do not use Viagra in cases of stroke, myocardial infarction, or unstable angina.
What should I know about sildenafil before taking it?
Effects on the reproductive system: The effects of Viagra typically last for 4 hours and may be longer. In some cases, Viagra can cause a dangerous condition known as priapism, which is a prolonged erection lasting more than 4 hours. If an erection lasts longer than 4 hours, seek medical attention immediately for timely intervention. Viagra should not be used in cases of erectile dysfunction due to penile curvature (Peyronie’s disease). Currently, there is no evidence that Viagra reduces male fertility.
How to get Viagra
In addition to its effects on the circulatory and reproductive systems, Viagra may cause some side effects on the nervous system, such as headaches, dizziness, flushing, and nosebleeds, as well as gastrointestinal effects like stomach pain and nausea. In some cases, Viagra may cause side effects related to the sense of smell, such as tinnitus or temporary deafness, or visual disturbances like vision loss and color distortion, especially in individuals with retinitis pigmentosa. Viagra should not be used in certain eye conditions, such as sudden vision loss due to non-arteritic anterior ischemic optic neuropathy (NAION), due to the risk of obstructing blood flow to the optic nerve. Do not use or exercise caution when using Viagra with medications containing nitrates, guanylate cyclase stimulators, and blood pressure medications such as long-acting alpha-blockers due to the risk of hypotension. The introduction of Viagra has brought happiness to many families and has alleviated a sensitive issue for a segment of men in modern society. Viagra is a medication that belongs to the group of PDE5 inhibitors. PDE5 is an enzyme that promotes the degradation of cGMP in the blood, and cGMP regulates blood flow in the penis. By inhibiting PDE5, Viagra helps relax smooth muscle and increase blood flow to the penis, supporting the ability to achieve an erection. Note: Simply taking Viagra does not create an erection! Although it is highly effective in maintaining an erection, Viagra will not work if the body is not stimulated and aroused. Viagra is formulated in the form of film-coated tablets, with dosages ranging from 25 to 100 mg. The usual dose is 50 mg; however, it can be increased or decreased depending on the response (note: this dosage of Viagra differs from the dosage used to treat pulmonary hypertension with the brand Revatio, which is typically 20 mg three times a day).
What other information should I know?
Viagra can be taken regardless of meals. Taking Viagra with food may reduce gastrointestinal side effects but will prolong the time for the drug to take effect. It is recommended to take Viagra 1 hour before sexual intercourse, as it is quickly absorbed into the bloodstream and reaches peak levels within 1 hour. Do not take more than one tablet per day. Viagra primarily affects the circulatory and reproductive systems: Effects on the circulatory system: Viagra can lower blood pressure, especially 1-2 hours after taking the medication. If you are taking blood pressure medication, consult your doctor before using Viagra.
- Viagra can improve confidence by helping men achieve and maintain an erection.
- Women do not take Viagra for sexual enhancement; research is ongoing.
- Viagra has been on the market since 1998 and is widely used worldwide.
- It may interact with other medications, including antifungals and antibiotics.
- Lifestyle changes, such as weight loss and quitting smoking, can improve ED.
- Viagra is classified as a phosphodiesterase type 5 inhibitor.
- Always store Viagra in a cool, dry place away from children.
Do not use Viagra in cases of stroke, myocardial infarction, or unstable angina.
- Viagra can cause a drop in blood pressure in some individuals.
- Men should report any sudden vision loss to their doctor immediately.
- Proper dosing prevents complications and optimizes results.
- Viagra is a well-studied and approved treatment for ED.
- Use of Viagra may improve overall confidence and mental health.
- The medication is not suitable for women and children.
- Always follow medical advice for safe and effective use.
Effects on the reproductive system: The effects of Viagra typically last for 4 hours and may be longer. In some cases, Viagra can cause a dangerous condition known as priapism, which is a prolonged erection lasting more than 4 hours. If an erection lasts longer than 4 hours, seek medical attention immediately for timely intervention. Viagra should not be used in cases of erectile dysfunction due to penile curvature (Peyronie’s disease). Currently, there is no evidence that Viagra reduces male fertility. In addition to its effects on the circulatory and reproductive systems, Viagra may cause some side effects on the nervous system, such as headaches, dizziness, flushing, and nosebleeds, as well as gastrointestinal effects like stomach pain and nausea. In some cases, Viagra may cause side effects related to the sense of smell, such as tinnitus or temporary deafness, or visual disturbances like vision loss and color distortion, especially in individuals with retinitis pigmentosa.
Other Treatments for Low Libido
It is very important not to take Viagra more than once a day, as exceeding this frequency increases the risk of serious side effects, including vision loss and significant drops in blood pressure. Viagra® (sildenafil citrate), a phosphodiesterase type 5 (PDE5) inhibitor, is an oral medication used to treat erectile dysfunction (ED). Viagra (sildenafil citrate) is indicated to treat: Viagra (sildenafil citrate) is indicated to treat: Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Comes in 25 mg, 50 mg, and 100 mg tablets Comes in 25 mg, 50 mg, and 100 mg tablets Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Comes in 25 mg, 50 mg, and 100 mg tablets Comes in 25 mg, 50 mg, and 100 mg tablets Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Known hypersensitivity to sildenafil or any component of tablet Known hypersensitivity to sildenafil or any component of tablet Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Known hypersensitivity to sildenafil or any component of tablet Known hypersensitivity to sildenafil or any component of tablet Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures *This information is from the label for brand name Viagra®. See the Full Prescribing Information for more complete information. Sildenafil, the active ingredient in Viagra, may also be the active ingredient in other medications, and this information may not be accurate for all medications that include the active ingredient sildenafil.
Does Viagra increase the size of a man’s penis?
*This information is from the label for brand name Viagra®. The information provided here is NOT MEDICAL ADVICE and is for informational and educational purposes only. The drug comparison tool does not determine eligibility for medications or treatments provided via the Hims/Hers platform. Consultation with a healthcare provider is required to assess suitability for any medical treatment based on individual health and medical history. All product names and associated trademarks are the property of their respective owners.
Mild side effects
Article by Pharmacist Duong Thu Huong - Vinmec Times City International General Hospital Viagra is a medication that belongs to the group of PDE5 inhibitors. PDE5 is an enzyme that promotes the degradation of cGMP in the blood, and cGMP regulates the blood flow in the penis. Therefore, a decrease in cGMP makes it difficult for men to achieve an erection. Viagra primarily affects the circulatory and reproductive systems. Viagra (active ingredient: Sildenafil) is a distinctive blue-green, diamond-shaped tablet that has been approved by the FDA for the treatment of erectile dysfunction. Viagra should not be used in certain eye conditions, such as sudden vision loss due to non-arteritic anterior ischemic optic neuropathy (NAION), due to the risk of obstructing blood flow to the optic nerve.
| Brand | Country/Region | Price Range (USD) | Typical Dosage |
|---|---|---|---|
| Viagra Original | US | $20–$60 per tablet | 50 mg or 100 mg |
| Sildenafil Generic | Global | $1–$10 per tablet | 25 mg, 50 mg |
| Kamagra | Europe/Asia | $2–$8 per tablet | 100 mg |
| Revatio (for PAH) | Worldwide | Varies | 20 mg (dosage for pulmonary hypertension) |
Do not use or exercise caution when using Viagra with medications containing nitrates, guanylate cyclase stimulators, and blood pressure medications such as long-acting alpha-blockers due to the risk of hypotension.
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