Some illegal businesses sell fake versions of real medicines, which can be dangerous or might not work. In the United States, the National Association of Boards of Pharmacy can tell you whether an online pharmacy is licensed and in good standing. If you live in another country, check to see if pharmacy association or regulation agencies offer services like these.
- Viagra is available in various dosages, usually 25mg, 50mg, and 100mg.
- It is important to follow a healthcare provider’s dosage instructions.
- Viagra is not an aphrodisiac and requires sexual stimulation to work.
- The medication can be affected by certain foods, such as high-fat meals.
- Overuse can lead to increased side effects or reduced effectiveness.
- Do not take Viagra more than once within a 24-hour period.
- Consult a doctor if you experience persistent erections or pain.
Make sure you get the right prescription and dose. When you order medicines and when you receive them in the mail, make sure they're the exact dose and type prescribed by your doctor or other health care professional.
Detection in biological fluids
If you have an erection that lasts more than four hours, call your care team right away. Treatments for erectile dysfunction are big business, and online scams abound. If you do buy medicines over the internet: Check to see if an online pharmacy is legitimate. Never order medicines from an online pharmacy that doesn't list its phone number and physical address, has prices that seem too good to be true, or tells you that no prescription is needed. Also stay away from ones that don't have a licensed pharmacist on staff to answer your questions. The dose is the amount of medicine you take.
- 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.
Don't be fooled into buying "herbal viagra." Never take any medicines that claim to be the "herbal" or nonprescription version of an oral medicine for ED. These aren't an effective option, and some contain harmful substances. Our caring team of Mayo Clinic experts can help you with your health concerns.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Oral Jelly | 100mg | 21 Sachets | 78.66€ 74.91€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ | |
| Viagra Generic | 200mg | 60 + 4 Pills | 125.19€ 119.23€ | |
| Viagra Oral Jelly | 100mg | 110 + 9 Sachets | 284.63€ 271.08€ | |
| Viagra Generic | 150mg | 270 + 10 Pills | 326.61€ 311.06€ | |
| Viagra Soft Tabs | 100mg | 10 Pills | 36.93€ 35.17€ | |
| Viagra Soft Tabs | 100mg | 90 + 6 Pills | 205.31€ 195.53€ | |
| Viagra Generic | 200mg | 20 Pills | 61.69€ 58.75€ | |
| Viagra Generic | 25mg | 270 + 8 Pills | 184.26€ 175.49€ | |
| Viagra Generic | 25mg | 60 + 4 Pills | 71.99€ 68.56€ |
Visit Mayo Clinic Men's Health to get started. Viagra is a medication used to treat erectile dysfunction by improving blood flow cialis or viagra for women to the penis. The drug is available in different dosages. The appropriate dose depends on factors like age, kidney or liver problems, and other medications being taken. While generally considered safe, Viagra can cause side effects, including headaches and low blood pressure. It can also interact negatively with other medications like nitrates.
Why is this medication prescribed?
As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. Vardenafil usually works for 4 to 5 hours. Its effects might last longer if you have mild to moderate ED. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. This medication is taken with or without food an hour before sex.
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It works for up to 36 hours. You can take it in a small dose daily or in a larger dose as needed. You can take this medicine with or without food 30 minutes before sex, depending on the dose. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. These medicines all work well for ED.
Viagra and herbs and supplements
When choosing one, tell your doctor or other health care professional what your preferences are, such as cost, ease of use, how long the drug's effects last and side effects. Generic versions of sildenafil, vardenafil and tadalafil are available. Check with your health care team before you take any medicine for erectile dysfunction. Oral ED medicines might not work or might be dangerous if you also take any of the following: Often, these are prescribed for chest pain called angina. Some examples of nitrates are nitroglycerin (Nitro-Dur, Nitrostat, others), isosorbide mononitrate (Monoket) and isosorbide dinitrate (Bidil). Viagra is a brand-name oral tablet prescribed for erectile dysfunction (ED). You’ll find key information about Viagra below. Drug class: phosphodiesterase type 5 (PDE5) inhibitor In several clinical studies, Viagra was effective in treating erectile dysfunction (ED). In these studies, males who used the drug had an improved ability to have and keep erections during sexual activity. To learn more about Viagra’s effectiveness, see the “Viagra uses” section.
| Age Group | Typical Use Scenario | Efficacy Rates | Common Side Effects |
|---|---|---|---|
| 20–30 years | First-time users, performance issues | 70–80% | Headache, flushing |
| 30–50 years | Ongoing erectile dysfunction treatment | 70–85% | Dizziness, nasal congestion |
| Over 50 years | Age-related erectile issues | 60–75% | Vision changes, dizziness |
| 18–20 years | Off-label or recreational use | Variable | Increased risk of adverse effects |
Use of the term “male” in this article refers to sex assigned at birth. Viagra typically starts to work between 30 and 60 minutes after you take a dose of the drug. But Viagra itself doesn’t give you an erection. You’ll need to be sexually aroused in order for the drug to work. Viagra keeps working in your body for up to 5 hours.
Brand names
These are commonly prescribed for an enlarged prostate or male pattern baldness. They include dutasteride (Avodart, Jalyn) and finasteride viagra red (Propecia, Proscar). Medicines that block an enzyme called CYP3A4. Oral medicine for ED also might not be safe or work well if you have: Very low blood pressure, called hypotension, or uncontrolled high blood pressure, called hypertension. Kidney disease that needs to be treated with dialysis.
When to call your doctor
These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. An inherited eye disease that affects the retina. Side effects of oral ED medicines are often mild. Visual changes, such as blue tinge to vision, sensitivity to light or blurred sight. Rarely, more-serious side effects can happen, including: Some people have suddenly lost some of their hearing or vision after taking one of these medicines.
Does Viagra prevent ejaculation?
But it isn't clear whether these side effects were caused by the medicine or by health conditions that the people already had. Get medical care right away if you take oral ED medicine and have sudden loss of hearing or vision. An erection that doesn't go away on its own. Called priapism, this rare condition can be painful. You need to get treatment for it as soon as possible to help prevent damage to your penis. This means that if you’re aroused, you should still be able to get an erection up to 4 hours after taking a dose of Viagra. Even though Viagra keeps working in your body for several hours, your erection shouldn’t last this long. In fact, in rare cases, Viagra can cause priapism (a long-lasting and sometimes painful erection). Priapism is a medical emergency that needs to be treated right away. If it’s not treated, the condition can damage the tissues in your penis and cause irreversible erectile dysfunction. If you have an erection that lasts longer than 4 hours, go to the nearest emergency room or call 911. Viagra may work faster if you take it on an empty stomach.
What should I know about storage and disposal of this medication?
medications used to treat pulmonary artery hypertension. Other drugs may interact with sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide. You can take Viagra (sildenafil) if you have high blood pressure that is controlled by blood pressure medications. You should tell your doctor if you have high or low blood pressure before starting Viagra.
Your questions answered
Cialis (tadalafil) and Viagra (sildenafil) are both prescription drugs used to treat erectile dysfunction (ED), but taking them together is generally not recommended. Mixing these medications can lead to dangerously low blood pressure and a higher risk of side effects. It takes from 30 minutes to 1 hour for Viagra (sildenafil) to start working, and the effects will last for about 4 hours. Viagra (sildenafil) is approved to treat sexual dysfunction in men by the U.S. Food and Drug Administration (FDA), but it is sometimes prescribed to women off-label, which means without approval by the FDA.
Sildenafil: the science
Viagra is an effective drug for treating male erectile dysfunction, but it targets sexual performance, not sexual arousal. There is limited evidence that Viagra may be beneficial for women with sexual dysfunction, but the trials have been small and the results inconsistent. In the U.S., you can legally buy generic Viagra (sildenafil) online, but only with a prescription from a licensed healthcare professional. Sildenafil for erectile dysfunction is not an over‑the‑counter (OTC) medicine in the U.S., so you cannot legally buy it without a prescription. Does generic Viagra work just like regular Viagra? If Viagra is taken with food, especially with a high fat meal, it will take longer to start working.
Potential Side Effects:
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Viagra only for the indication prescribed. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. Medicines that you take by mouth are called oral medicines. They're often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction (ED). Oral medicines for ED usually work well and cause few side effects.
Drug details
The four main medicines taken by mouth for erectile dysfunction are: They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called nitric oxide. This boosts blood flow and helps you get an erection from sexual activity. Each oral medicine for ED has a slightly different chemical makeup. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take.
Does Viagra help with premature ejaculation?
This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or alcohol. Its effects often last for 4 to 5 hours. It might work longer if you have mild to moderate erectile dysfunction. This medicine also works best when you take it an hour before sex on an empty stomach. And in this case, it could even be less effective for you.
- Viagra can help improve the quality of your sexual relationship.
- People should inform their doctor about any allergies before use.
- Viagra is part of a broader class of medications called PDE5 inhibitors.
- Sexual desire is still necessary for Viagra to be effective.
- Regular health check-ups can monitor the effects of the medication.
- Some users report improved self-esteem with proper use.
- Proper hydration can help reduce side effects like headaches.
Viagra is approved to treat erectile dysfunction (ED) in males. With ED, you have trouble getting and keeping an erection that’s firm enough to allow you to have sex. When you’re sexually aroused, your brain sends messages to your penis.
- Viagra's effectiveness may diminish with age or health conditions.
- There are natural alternatives, but their efficacy varies.
- It is advisable to take Viagra on an empty stomach for quicker action.
- Certain medications, like antibiotics, may either enhance or diminish its effects.
- Avoid combining Viagra with other ED medications to prevent overdose.
- Always consult a healthcare professional before starting Viagra.
- It is not recommended to take Viagra if you have severe liver or kidney problems.
These messages cause certain chemicals to be released in your penis. One of these chemicals, called cyclic GMP, relaxes and widens certain blood vessels in your penis.
| Drug Class | Interaction Effect | Risk | Recommendation |
|---|---|---|---|
| Nitrates | Severe hypotension | Dangerous drop in blood pressure | Avoid simultaneous use |
| Alpha-blockers | Enhanced blood pressure lowering | Dizziness, fainting | Use under medical supervision |
| CYP3A4 inhibitors | Increased sildenafil levels | Potential toxicity | Adjust dosage or avoid use |
| Antidepressants | Possible increased side effects | Dizziness, headache | Discuss with doctor |
Cyclic GMP also relaxes the muscles around the erectile tissue in your penis that’s called the corpus cavernosum. These actions allow blood to flow into the corpus cavernosum, which causes your penis to get hard and become erect. ED can occur if you have certain problems that affect your body’s ability to have an erection.