Sildenafil, the active ingredient in Viagra, has a four-hour "half-life." This means that it can produce an erection for about four hours after taking a pill.

However, a full erection will only occur if sexual stimulation is also present. Also, a man should not take sildenafil while eating, as this can slow the drug's absorption.

Erections last from 2 to 6 hours

Sildigra 25 blocks an enzyme called phosphodiesterase type 5, which inhibits blood flow to the penis. By blocking PDE5, it relaxes smooth muscles and arteries in the penis, encouraging blood to flow into the area, causing an erection. It also works by increasing the amount of cGMP, which is an important chemical for getting and maintaining an erection.

It is recommended to take sildenafil in tablet form, typically about an hour before sexual activity. The medication should not be taken more than once per day as it can cause serious side effects, such as vision loss and low blood pressure. It can also be less effective when consumed with alcohol.

Viagra (sildenafil) is a popular prescription drug that treats erectile dysfunction and pulmonary arterial hypertension, or PAH. It can be taken by mouth or by injection and is available as a brand-name medication or a lower-cost generic. It can also be combined with nitrates, such as nitroglycerin (Nitrostat), to treat angina.

It is important to note that sildenafil only works if you are sexually aroused, and will not work for unaroused men or women. You should also be careful not to take too much of the medication or it may be dangerous, as excessive doses can lead to an erection that lasts more than 4 hours, and can also damage your penis. If you experience severe erections that are painful or have chest/jaw/left arm pain, or nausea, you should seek medical help right away.

Erections last from 4 to 8 hours

Sildenafil (Viagra) works by blocking phosphodiesterase type 5 (PDE5), which normally breaks down cGMP. This increases blood flow to the penis and allows the muscle tissue to harden. Typically, this results in an erection that lasts from 4 to 8 hours. It also helps men to achieve and maintain an erection during sexual activity. It is a powerful medication, and it can be harmful if not taken properly. It is important to take it with a glass of water and to avoid taking it with fatty foods.

The drug is available in tablet form and should be taken up to an hour before sex. It is recommended to take it on an empty stomach for the fastest results. The effects of sildenafil are most noticeable when it is used as prescribed by a doctor or pharmacist. It is important to seek medical attention if you experience any serious side effects, such as swelling of the face, lips, tongue or throat, or difficulty breathing. You should also seek emergency medical attention if you have a prolonged erection that lasts more than four hours, as this could be a sign of priapism, which is a life-threatening condition.

Erectile dysfunction (ED) affects 30 million American men, and it can be caused by many factors, including age, psychological problems, or certain medications. It is a common condition and can be treated with a low dose of sildenafil. The drug can be taken as part of a larger treatment plan that includes addressing the underlying cause of the ED.

Erections last from 8 to 12 hours

Sildenafil (Viagra) is a prescription medicine that treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps you achieve and maintain an erection. It also can help if you are sexually aroused but haven’t been able to get an erection. It doesn’t stop STDs, so you should still practice safe sex by using a condom.

The effect of Viagra lasts about four hours. It can vary from person to person, but it is usually best to take the medication 30 minutes before you want to have an erection. You should not take more than one tablet in 24 hours. If you do, you might have side effects such as a headache, flushing, or indigestion.

You can take sildenafil with or without food, but you should not eat foods high in fat or cholesterol. This can make it harder for the drug to work, so you should eat a light meal before taking it. If you have liver or kidney disease, your doctor may advise you to take a lower dosage of the drug.

Sildenafil is available as the brand-name medication Viagra, and it is also sold as the generic drug Revatio. It’s also available as a liquid. Both medications are in a class of drugs called phosphodiesterase type 5 inhibitors. Other PDE5 inhibitors include Levitra and Cialis.

Erections last from 12 to 24 hours

Sildenafil 25 is the lowest dosage of the popular drug Viagra. It is prescribed for men who haven’t been able to tolerate higher doses or have unwanted side effects. The drug begins to work in about 30 minutes and reaches its peak at around four hours after taking it. However, the duration of the effect depends on a few factors, such as the amount of alcohol you drink and your sensitivity to medication.

The medicine works by blocking phosphodiesterase-5 (PDE-5). PDE-5 is an enzyme that breaks down nitric oxide, which causes blood vessels to relax. This increases blood flow to the penis and creates an erection. It is important to take the pill on an empty stomach to get the best results. It is also a good idea to take the drug about an hour before sexual activity. You can also buy medicines at a reasonable cost from Genericcures.

You should not take more than one dose of Viagra a day, as it may increase your risk for serious side effects. Call your doctor if you have severe side effects, such as loss of vision or low blood pressure. You should not take this medication if you have a condition called pulmonary arterial hypertension. It can cause your blood pressure to drop too low and you could lose consciousness.

Sildenafil is available as an oral tablet and as the brand-name drugs Viagra and Revatio. It is also available as a generic medication and in other forms, including a liquid suspension and a solution for injection. It is used to treat erectile dysfunction and pulmonary arterial hypertension (PAH). It works by increasing blood flow to the penis and helps men achieve and maintain an erection during sexual stimulation.