A prolonged erection that lasts more than 4–6 hours may be due to a condition called priapism.
Side effects
Your body rapidly absorbs Viagra into the blood, and it usually works within an hour. However, it can take between 30 minutes and 4 hours to have an effect. You should take Viagra before sexual activity as needed. Doctors do not recommend taking Viagra more than once a day. Viagra may work faster when you take it on an empty stomach.
Can Viagra be crushed, split, or chewed?
If you eat before taking Viagra, avoid a high-fat meal if you want the drug to work faster. Fat can slow down the absorption of Viagra into your bloodstream by an hour. After taking a 100mg dose, Viagra stays in the bloodstream for up to 18 hours after taking the medication. After 4–5 hours, only very small amounts are detectable. After taking Viagra, your erection should not last more than four hours.
Dosage adjustments
While Viagra is still in your system, the effect on erections wears off due to the low amounts left in your body. Most side effects of Viagra are mild and temporary. The most common side effects may include, but are not limited to: As the dose increases, the risk of experiencing side effects becomes more likely. If you experience any side effects, speak with your doctor to see whether you should reduce viagra connect form your dosage. One study⁴ of men who took the active ingredient of Viagra, sildenafil, concluded that almost half of the participants experienced at least one adverse effect. This damages the penile tissue and can lead to permanent loss of erectile function. Blurred vision or the sudden loss of vision in one or both eyes may suggest a condition called non-arteritic anterior ischemic optic neuropathy (NAION), which damages nerves in the eye. Studies have associated Viagra with hearing loss or reduction and tinnitus (ringing or buzzing in the ears). Chest pain, an irregular heartbeat, or a heart attack may occur when using Viagra. Although rare, they’re more common if you have pre-existing heart disease.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Oral Jelly | 100mg | 110 + 9 Sachets | 284.63€ 271.08€ | |
| Viagra Oral Jelly | 100mg | 90 + 8 Sachets | 258.02€ 245.73€ | |
| Viagra Generic | 200mg | 20 Pills | 61.69€ 58.75€ | |
| Viagra Generic | 50mg | 90 + 6 Pills | 107.37€ 102.26€ | |
| Viagra Oral Jelly | 100mg | 21 Sachets | 78.66€ 74.91€ | |
| Viagra Super Active | 100mg | 30 + 6 Pills | 64.09€ 61.04€ | |
| Viagra Original | 100mg | 64 + 4 Pills | 264.15€ 251.57€ | |
| Viagra Generic | 100mg | 10 Pills | 28.91€ 27.53€ | |
| Viagra Oral Jelly | 100mg | 10 Sachets | 46.36€ 44.15€ | |
| Viagra Super Active | 100mg | 20 + 4 Pills | 48.05€ 45.76€ | |
| Viagra Generic | 25mg | 20 Pills | 37.74€ 35.94€ | |
| Viagra Oral Jelly | 100mg | 63 + 7 Sachets | 190.54€ 181.47€ | |
| Viagra Generic | 25mg | 120 + 6 Pills | 125.56€ 119.58€ | |
| Viagra Generic | 200mg | 120 + 8 Pills | 204.80€ 195.05€ |
Some people may experience bleeding in the brain or lungs. Seizures are a rare but serious side effect of taking Viagra.
- Viagra can improve quality of life for men with ED.
- It has a rapid metabolism, often cleared within 4 hours.
- Erectile dysfunction may indicate underlying health problems needing attention.
- Some people experience back pain or muscle aches as side effects.
- It is recommended to avoid fatty foods close to the time of taking Viagra.
- Using Viagra without medical supervision is unsafe.
- Erectile response to Viagra depends on psychological and physical factors.
- The medication is available at pharmacies with a valid prescription.
When taking Viagra, there are some precautions to be aware of. Your correct dose will depend on your age, underlying medical conditions (such as liver and kidney problems), and any other medications you’re currently taking. Always follow the dosage advice given by your doctor. Studies on Viagra in older adults are less extensive.
More about Viagra (sildenafil)
Most adverse effects, however, were mild or moderate. Another study of 979 men with ED found that 3.8% had adverse effects that required a dosage change or discontinuation of Viagra. If you experience any of the following side effects, stop using Viagra and seek medical attention immediately. Swelling around the face and mouth, tightness in the throat, and difficulty breathing, are signs of an allergic reaction. This can be life-threatening, so you must seek emergency care. Researchers believe a low dose of 25mg is best suited for people over 65.
Proper Use
Do not take a higher dose of sildenafil than your provider orders for you. Headache, facial flushing, stuffy or runny nose, and upset stomach can occur. Less frequent side effects include blurry vision, a bluish hue to the field of vision, difficulty telling the difference between the colors blue and green, sensitivity to light, or a sudden loss of vision or hearing. If you experience any of the following while using sildenafil, you should seek immediate medical attention: An erection lasting more than 4 hours. Chest, arm or neck pain, or nausea during sexual activity.
What’s the youngest age for which Viagra is safe to use?
Sudden loss of vision in one or both eyes, loss of hearing, ringing in the ears, or dizziness. Remember, sildenafil does not protect against sexually transmitted diseases, nor does it prevent pregnancy. Effective birth control is recommended during cancer treatment. Even if you are not producing sperm, you could still be fertile and conceive. Erectile dysfunction (ED) can be an upsetting and distressing condition and impact relationships.
Is Viagra safe to use?
However, your doctor can treat and manage the issue. Several highly effective treatments can help you regain erectile function. One of these is a medication called Viagra. We make it easy for you to participate in a clinical trial for Erectile dysfunction, and get access to the latest treatments not yet widely available - and be a part of finding a cure. Viagra is an oral prescription drug for ED. This is because it takes them longer to clear Viagra from their system due to a slower metabolism.
- Viagra’s patent protection has expired, increasing accessibility.
- It can be used in combination with other ED treatments.
- The medication’s safety profile is well established through clinical trials.
- Certain diets or supplements may influence Viagra’s effectiveness.
- Long-term safety studies are ongoing to assess risks.
- Viagra is generally well tolerated but requires caution in certain populations.
- Patients with cardiovascular conditions should seek medical advice before use.
- Proper storage includes keeping the medication in a cool, dry place.
If you have certain underlying medical conditions, it may not be safe for you to take Viagra, or you may need to use caution when taking it.
- Over-the-counter Viagra is illegal and potentially dangerous.
- Misuse can lead to priapism, a painful prolonged erection.
- Viagra’s effectiveness may decrease with age or certain health conditions.
- It is important to be aware of potential drug interactions.
- Women should not take Viagra, as its safety for them is unproven.
- The drug’s development was based on research into nitric oxide’s role in vasodilation.
- Viagra is on the World Health Organization’s list of essential medicines.
- Attention to dosage is vital to avoid adverse effects.
Let your doctor know if you have any underlying medical conditions, but the following are particularly important: Viagra may not be suitable for you if you have: If you have high or low blood pressure or are highly sensitive to blood pressure changes, Viagra may not be appropriate. This is because Viagra lowers your blood pressure, which can worsen a pre-existing issue. If you have the genetic eye condition retinitis pigmentosa, Viagra may not be safe for you. It may increase your risk of experiencing severe eye-related side effects. If you’re predisposed to priapism or have ever had an erection that was painful or lasted more than four hours, make sure your doctor is aware. If you have any bleeding disorders or problems with your blood cells, including sickle cell anemia or leukemia, you might be at an increased risk of negative side effects. If you have impaired liver or kidney function, you may require a lower dose of Viagra.
| Parameter | Value | Notes |
|---|---|---|
| Absorption Time | 30-60 minutes | Peak plasma concentrations |
| Bioavailability | ~40% | Due to first-pass metabolism |
| Half-life | 4-5 hours | Time for plasma concentration to reduce by half |
| Metabolism | Liver (CYP3A4 enzyme) | Mainly processed in the liver |
| Excretion | Feces and urine | About 80% in feces, 13% in urine |
It may be harder for your body to clear Viagra from your system safely. Use Viagra with caution if you have any physical deformations of the penis, such as Peyronie's Disease, angulation, or cavernosal fibrosis.
Key takeaways:
Other brand names of sildenafil include Aronix, Liberize, Nipatra, Revatio, and Granpidam. The role of Viagra is to increase blood flow to the penis, a critical component of having an erection. Viagra falls under a category of medications called phosphodiesterase-5 inhibitors (PDE5 inhibitors).¹ PDE5 is a naturally-occurring enzyme that blocks cGMP, the protein responsible for causing erections. Viagra prevents PDE5 from having a negative effect on erections and allows cGMP to work on relaxing the smooth muscle in the penis. ED is the persistent inability to achieve or maintain an erection firm enough for satisfactory sexual intercourse.
Frequently asked questions
The Food and Drug Administration (FDA) approved Viagra for the treatment of ED in people with a penis over the age of 18. Research² has shown that Viagra improves the firmness, frequency, and maintenance of erections. It also indirectly enhances other aspects of relationships, which ED can damage, including: The frequency and level of desire in relationships The frequency and level of desire in relationships Numerous studies have backed up the effectiveness of Viagra, such as: One study³ on men with ED found that more than 94% of the participants were satisfied with the effect that Viagra had on their erections and sexual activity. One study³ on men with ED found that more than 94% of the participants were satisfied with the effect that Viagra had on their erections and sexual activity. Viagra is slightly more effective at higher doses.
Erectile dysfunction
Viagra is most effective in mild and moderate ED: Severe ED may be less likely to respond to Viagra. Viagra is effective for ED caused by various factors, including diabetes, spinal cord injuries, and prostate surgery. Viagra can only help you achieve an erection if you are sexually aroused. It won’t work if you’re not experiencing sexual arousal. Viagra is not a cure for ED, as the medication wears off within a few hours. If you’ve had a stroke in the past six months, use Viagra with caution and follow your doctor’s advice. Research has not determined the safety of Viagra in those with stomach ulcers. Some experts advise avoiding grapefruit or grapefruit products when using Viagra. This is because grapefruit can increase the amount of Viagra in your blood. An increased amount could raise your risk of experiencing negative side effects. Lifestyle factors such as smoking, drug use, and drinking alcohol may increase the risk of severe side effects or influence the effectiveness of Viagra. Seek medical attention if you take too much Viagra. They can negatively impact how it works and your overall health. If you take any of the following medications, let your doctor know before starting Viagra: These include alpha-blockers and guanylate cyclase stimulators: When taken with Viagra, your blood pressure may drop to dangerously low levels, causing dizziness and fainting. If you take blood pressure medications, your doctor may prescribe you a lower dose of Viagra. These include medications for chest pain, which can also lower your blood pressure, and some street drugs, like poppers. Other medications that contain the active ingredient sildenafil, such as Revatio. Doctors commonly prescribe these for pulmonary arterial hypertension. Other ED medications, such as alprostadil, Cialis, and Levitra Other ED medications, such as alprostadil, Cialis, and Levitra Viagra is a prescription drug, so you will need to see your doctor before obtaining it to make sure it will be safe for your circumstances. You should only purchase it online through a registered pharmacy when you have a prescription. 2013 research found that up to 77%⁵ of Viagra purchased online was fake. Buying fake drugs to avoid the embarrassment you may feel speaking to your doctor isn’t worth the risk to your health.
| Condition / Situation | Reason | Recommendation |
|---|---|---|
| Use with Nitrates | Risk of severe hypotension | Avoid concomitant use |
| Cardiovascular conditions | Increased heart attack risk | Consult doctor before use |
| Recent stroke or unstable angina | Potential for worsening condition | Avoid until stabilized |
| Liver or kidney impairment | Altered drug metabolism | Dose adjustment necessary |
| Allergies to sildenafil or excipients | Risk of allergic reactions | Check ingredients carefully |
Your doctor has seen ED many times: It’s estimated that ED affects half of all men during their lifetime at any age. See a doctor if you think you have ED. Several underlying medical causes — such as type 2 diabetes, high blood pressure, and penile injuries — may need treatment before they worsen.
- Research continues into new formulations of ED medications inspired by Viagra.
- Viagra's effects can differ based on individual blood chemistry.
- Combining Viagra with recreational drugs is highly dangerous.
- Men with neural or psychological ED might benefit from therapy alongside medication.
- The drug was a result of research into vascular health and nitric oxide.
- Viagra can be used as a diagnostic tool in certain medical tests.
- It is crucial to follow prescribed doses to avoid adverse reactions.
- Lifestyle changes, like exercise and diet, can improve ED alongside medication.
Once you’ve started Viagra, you might need to see your doctor again. If you want to reduce the dose or think you need a higher dose, always check with your doctor first.