Sildenafil is a common medicine used to treat pulmonary arterial hypertension and to stimulate erections in men with erectile dysfunction (ED). Viagra is the most often prescribed brand-name variant of this medicine for the treatment of erectile dysfunction. Several factors can influence how long it takes for something to start working. In most cases, Viagra takes about 20 minutes to produce detectable effects.

We’ll go over what Viagra is, how it works to treat erectile dysfunction, how we can use it, and a lot of other vital information.

What exactly is Viagra?

Viagra is a well-known brand-name prescription drug that has been approved by the FDA to treat erectile dysfunction in men (ED). You can’t get or keep an erection if you have erectile dysfunction. This drug is only for men over the age of eighteen.

Viagra is made up of the substance sildenafil, which belongs to the phosphodiesterase type 5 inhibitors class of medications. It works by increasing blood flow to the penile area, which aids in obtaining and maintaining an erection. This medicine, however, only works if you are sexually aroused.

Viagra is available in the form of tablets that can be taken orally. It should be consumed around thirty minutes before sexual activity in various scenarios, although it can be taken anywhere from 20 minutes to three hours prior. It’s also available in three other strengths: 25 mg, 50 mg, and 100 mg.

There are numerous generic Viagra variations on the market. A generic drug is a carbon copy of the active ingredient found in brand-name drugs. In the form of the original drug, the generic is regarded as safe and effective. Generic pharmaceuticals are less expensive than brand-name drugs.

Is Viagra effective in the treatment of ED?

Yes, Viagra can help with erectile dysfunction and has a cardiac effect. Viagra has been shown to be effective in treating erectile dysfunction in numerous research and clinical investigations. Males who used the medicine had an enhanced capacity to get and retain erections that allowed for successful intercourse in these studies. Between 50 percent and 80 percent of guys who took Viagra had erections that were aided by the drug, according to the research.

What is the mechanism behind it?

When the nerves in your penis are stimulated, you get an erection. As a result, muscles around two cylinder-shaped chambers of spongy material called the corpus cavernosa along your penis allowed blood to flow in, resulting in an erection.

Your nerves don’t communicate well with your brain, and blood doesn’t flow properly into the corpus cavernosa when you have erectile dysfunction. Viagra relaxes the walls of blood vessels, allowing blood to flow more freely into the parts of the penis that trigger erections. When you take Viagra as an oral tablet, it usually starts working 20 to 50 minutes after you consume it. Working on it can take up to three hours.

Viagra does not work by itself. To have an erection, you’ll still need to be sexually stimulated. It can also assist it take effect faster if you are comfortable and relaxed.

Circulatory system (heart)

To generate an erection, Viagra requires a well-choreographed chain of events. It begins with arousal signals from your brain, and it provides for adequate blood flow to the various sections of your penis.

The corpora cavernosa is a pair of chambers in your penis. During sexual stimulation, nitric oxide (NO) is released in the chambers. It can cause muscles to relax by activating an enzyme called guanylate cyclase, which increases levels of cyclic guanosine monophosphate (cGMP).

A network of blood arteries runs through the chambers. Blood flows into these blood arteries when they relax and broaden. The erection is triggered by the resulting pressure.

Instructions on how to use Viagra step by step 

Sildenafil is a drug that is used to treat difficulties with male sexual function (impotence or erectile dysfunction-ED). When used in conjunction with sexual stimulation, sildenafil helps a man get and maintain an erection by boosting blood flow to the penis. This medication will not protect you from sexually transmitted infections (such as HIV, hepatitis B, gonorrhea, syphilis). Use latex condoms and practice “safe sex.” For more information, talk to your doctor or pharmacist.

Before you start taking sildenafil, and every time you get a refill, read the Patient Information Leaflet provided by your drug specialist. If you have any questions, consult your primary care physician or a medication expert.

Accept this drug by mouth as directed by your primary care physician, usually on a case-by-case basis, to treat erectile brokenness in the ED. Before sexual activity, take sildenafil for around 20 minutes, but no more than 3 hours (30 minutes before is the best). Don’t take it more than once a day. A high-fat meal could delay the onset of the medication’s effects.

The measurements are based on your illness, treatment response, and any medications you may be taking. Make sure to tell your PCP and drug expert about all of the medications you’re taking (counting physician recommended drugs, nonprescription medications, and home-grown items).

How long will Viagra last?

All things considered, Viagra usually lasts between 2 and 3 hours before its effects start to fade. Depending on your dimensions, your body’s digestion, and other external circumstances, Viagra can last up to 5 hours or longer.

You might be able to have an erection a few times with Viagra in your body, depending on how your body uses it. However, Viagra is unlikely to extend your time in bed. There has been no conclusive evidence that Viagra can increase the length of time you can have a sexual encounter.

After you’ve had intercourse, Viagra might not function again. Normally, you won’t be able to achieve another erection right after discharge because your body isn’t prepared for it.

Is there anything that can influence how long it lasts?

Many important elements can influence how long Viagra lasts in your body:


The amount of Viagra you take determines how long it will last in your system. The smallest available dose (of 20 mg) would not last as long as the highest available dose (of 50 mg). However, taking a greater amount is not usually recommended because it may be harmful to your health.


Your metabolic system slows or slows down as you get older. As a result, Viagra may last longer as you become older. When you’re 60 or older, Viagra usually works for a longer period of time. 

Diet and way of life

If you have a big meal or eat a lot of high-fat foods right before you take Viagra, it won’t be absorbed or digested as quickly. However, because it is metabolised with your food, it may last longer. Smoking or drinking alcohol might restrict blood flow to the penis, making Viagra less effective or lasting.



Certain medications, notably antibiotics such as erythromycin (Ery-Tab), ciprofloxacin (Cipro), and clarithromycin (Biaxin), can interfere with Viagra and shorten its duration.

Overall well-being

Existing medical issues can affect how long Viagra lasts and how effectively it works for you. Disorders of the nervous system, such as multiple sclerosis (MS), clarithromycin (Biaxin), and cardiac conditions, such as atherosclerosis, can all make Viagra less effective and last longer. Due to the effect of kidney disease on your metabolism, Viagra may last longer in some cases.


Psychological condition


How your body reacts to sexual stimulation depends on whether you’re anxious, sad, apprehensive, or stressed. Viagra may not last as long or as well if you are nervous or uncomfortable during sex, or if you have performance anxiety as a result of previous sexual experiences.


What is the time it takes for it to leave my system?

In most cases, Viagra will exit your system in two to three hours. It can take 4 to 5 hours for it to completely leave your system, depending on your metabolism.

It will take longer for a high dosage to leave the body. A 20 mg dose may leave your system after a few hours, but a 50 mg dose may take three times as long.

Side effects of Viagra

Side effects from Viagra can range from mild to severe. Consult your pharmacist, doctor, or medical health care provider for more information on Viagra’s potential side effects. They can provide you advice on how to cope with any issues that may arise.

The FDA keeps track of the negative effects of the medicines and pharmaceuticals it approves. If you have experienced a side effect from Viagra, you can report it to the FDA through the medical watch website.


Viagra is a possible medicine that improves blood flow to your penis, allowing you to have and keep an erection. It is effective, but it has some disadvantages. Viagra is a brand-name form of the drug sildenafil, which is a generic. It’s a type 5 phosphodiesterase inhibitor. It’s an enzyme that regulates certain molecules in your blood, but it makes getting and keeping an erection more difficult.