Viagra is a powerful drug It works by relaxing the muscles in the walls of blood vessels in certain areas of the body so you can get and maintain an erection. In most cases, Viagra works well and has changed people’s lives for the better It’s effective, but it can also cause some side effects.

The word Viagra is the brand name for sildenafil citrate and is used to treat (ED) erectile dysfunction and pulmonary arterial hypertension.

Viagra helps you temporarily maintain an erection so you can have sex, it doesn’t cure ED and It doesn’t affect sexual desire either but You still need mental or physical stimulation to get an erection.

This medicine originally developed by scientists in the United Kingdom, it was brought onto the market by Pfizer Inc., a pharmaceutical company in the United States.

Reproductive system

Viagra can be quite useful but it’s no magic pill. It does nothing for your sexual urge. You still need some kind of stimulation to get an erection.

The effects of Viagra mostly last for about 4 hours, though they may last longer for some men. An uncommon but serious side effect is priapism. That’s when you get an erection for a long period of time. Then it becomes quite painful.

If you have an erection and that’s more than 4 hours, get immediate medical attention.

You should also be careful of PDE5 inhibitors if you have an anatomical abnormality of the penis. If you have Peyronie’s disease, your doctor may recommend against taking Viagra.

Viagra is not a long-term fix and doesn’t cure ED. Viagra offers no protection from sexually transmitted infections (STIs).

Central nervous system

Viagra only helps to improve blood flow to the penis, but your brain is still your most valuable sex organ. Remember Viagra won’t work if you’re not in the mood.

A Few potential side effects of Viagra are headache and a runny or blocked nose, or a nosebleed. Few men feel lightheaded or dizzy. In very rare cases, Viagra can cause fainting. Few men taking PDE5 inhibitors report back or muscle pain.

It’s not common, but few men experience ringing in the ears, hearing loss, or vision loss after taking PDE5 inhibitors.

Avoid PDE5 inhibitors if you have a past with an eye condition called non-arteritic anterior ischemic optic neuropathy (NAION). NAION is identified by the interruption of blood flow to the optic nerve.

The Excretory and digestive system

Viagra comes in a film-coated tablet. You can take Viagra with or without food, and it’s best to take it about an hour before you plan for any sexual activity.

Do not take Viagra pills more than once per day.

Almost 80 percent of Viagra leaves your body in your feces and the rest is washed out with your urine.

One fairly common side effect of Viagra is stomach upset or indigestion.  PDE5 inhibitors can sometimes cause vomiting or nausea.

Is Viagra Safe  

Viagra is normally safe to use in moderation but taking it may cause a range of adverse effects.

According to clinical trial results, the most common side effects are

• Headaches
• nasal congestion
• impaired vision
• photophobia, or sensitivity to light
• Indigestion

Rarely, some users have experienced cyanopsia, where everything appears to have a tinted blue tinge.

In some cases, Viagra use can lead to nonarteritic anterior ischemic optic neuropathy or damage to the optic nerve.

Other possible side effects are:

• rarely, priapism, a painful, long-lasting erection
• heart attack
• sudden hearing loss
• increased intraocular pressure
• ventricular arrhythmias

After 2007, Viagra mark labeling in the U.S. has added a warning of the potential risk of sudden hearing loss.

Viagra can drop blood supply to the optic nerve, causing sudden vision loss. This very rare unfortunate event occurs mainly in people with heart disease, hypertension, diabetes, high cholesterol, or pre-existing eye problems.

Interactions

People with HIV who take protease inhibitors should talk about using Viagra with their doctors. Protease inhibitors raise the risk and severity of side effects. This People do not have more than 25 milligrams (mg) of Viagra at a time, and not more often than every 48 hours.

People who are taking alpha-blockers should make sure they take Viagra at least 4 hours before or after taking alpha-blockers. This can help prevent dangerously low blood pressure.

Contraindications

The following people should not take Viagra, or should check with their doctor first:

• people who take nitric oxide donors, nitrates, and organic nitrites
• people with severe liver impairment
• people with kidney disease
• men who are suggested to refrain from sexual intercourse because of cardiovascular risk factors
• those who have had a recent heart attack or stroke
• individuals with low blood pressure (hypotension)
• individuals with hereditary degenerative retinal disorders

Few athletes take Revatio to increase their exercise capacity, but there is little evidence to support this use.

Effects of Viagra 

Viagra pills can help a man who cannot achieve or sustain an erection due to erectile dysfunction. It makes better the erectile response when a man is already sexually stimulated but it does not provide sexual stimulation. If there is no sexual activity viagra will not work.

At the point when sexual activity happens nitric oxide is released by the nervous system in the erectile tissue of the penis Nitric oxide stimulates an enzyme that makes messenger cyclic guanosine monophosphate (cGMP).

cGMP affect the arteries in the penis to dilate so that the arteries and the erectile tissue to fill with blood.

Viagra blocks cGMP from becoming degraded, so the blood flow and the erection can continue.

How long do the effects of Viagra last?

The effect of Viagra can last for approximately 4 hours. This can slightly vary between men. Through this time you will find it easier to get an erection

But if you get an erection and that is painful or lasts over four hours you need to get medical help as you may be experiencing a condition called priapism, which can cause damage to your penis.

Dosage

The dosage will be different if the drug is used for erectile dysfunction or for pulmonary arterial hypertension.

Viagra. 

For erectile dysfunction, Viagra pills come in blue, diamond-shaped in doses of 25, 50, or 100 mg.

The individual takes a maximum of one pill in a day 30 minutes to 1 hour before sexual intercourse.

Revatio.

For pulmonary arterial hypertension, Viagra pills come in white, round, film-coated tablets. People intake one 20-mg Revatio tablet three times a day.

Viagra overdose

A Viagra overdose can be pretty serious. if you believe you have had more than one dosage, call a doctor or local Poison Control Center.

symptoms of an overdose might are:

• Vomiting
• papilledema – swelling in the optic nerve
• blurred vision and distorted vision
• optic neuropathy – damage to the optic nerve
• prolonged priapism
• tachycardia (increased heart rate)
• Blindness
• prolonged priapism
• Diarrhea
• rhabdomyolysis – break down of muscles

Deaths from Viagra overdose are very rare but it is possible.

Very common and common side effects

Viagra can cause side effects in a few men. They are mostly temporary and mild.

Very Common Side Effects

The most common side effect of taking Viagra is a headache, which affects at least one in ten men who take Viagra pills. A mild headache is not very serious and should pass quickly. In the meanwhile, you can use over-the-counter painkillers such as aspirin or paracetamol.

Common Side Effects (affecting at least 1 in 100 people)

Common side effects of Viagra are nausea, facial flushing, and hot flashes. Few men also complain of indigestion, nasal congestion and dizziness after taking their tablets. 

All of these side effects tend to pass very quickly but you should be careful not to drive or operate machinery if you feel dizzy as a result of your treatment.

Another common side effect of Viagra is an eyesight disturbances, such as blurred vision or a blue tinge to your vision. In most cases, this side effect only lasts for a few minutes. If you experience problems with your vision which lasted more than an hour or which severely affects your ability to see you should get medical help immediately.

Uncommon side effects

Uncommon viagra side effects happen in no more than one in 100 men who take it.

They are:

• Visual symptoms such as redness, pain or sensitivity
• Stomach upsets
• A rapid heart rate or changes in your blood pressure
• Blocked or runny nose
• Muscle aches
• Rashes
• Ringing in the ears or dizziness

Rare Side Effects

In 1 in 1000 people, Viagra can cause rare side effects. 

They are:

• Eye changes – such as double vision, bleeding at the back of the eye, swelling of the eye or eyelid
• Irregular heartbeat
• A drop in blood pressure leading to fainting, stroke or a heart attack
• Bleeding from the penis
• numbness or swelling in your mouth, throat or nose
• Feeling irritable
• Hearing difficulties

How do I recognize an allergic reaction

Allergic reactions to Viagra are very uncommon but they can potentially be dangerous. Go to the doctor immediately if you develop the following symptoms:

• Breathing problems
• Wheezing
• Dizziness
• Swellings of the face, mouth or throat

You shouldn’t take Viagra if you are allergic to any of the ingredients or have ever had an allergic reaction to similar medication.

How to avoid the side effects of Viagra 

• Get a prescription from your GP or online doctor

Your doctor will make sure Viagra is suitable for you before prescribing your treatment. If you have any medical conditions or you are taking any other medication, you may be at an increased risk of side effects.

• Don’t drink too much alcohol

Alcohol increases the risk of certain side effects, like low blood pressure and dizziness. It also decreases your ability to get an erection. Keep away from alcohol will help you minimize your risk of side effects and help you get the most from your medication.

• Do not take more Viagra than you have been prescribed

You should never go over the dosage that your doctor has prescribed for you. Ask your doctor if you feel that the dosage you are taking is not high enough.

• Don’t mix Viagra with other recreational drugs

Keep away from recreational drugs during your treatment with Viagra – some illegal or ‘legal high’ drugs interact with Viagra and taking them can be dangerous.

• If you experience side effects of Viagra, try a lower dosage

If you experience some side effects you may benefit from trying a lower dosage. You can also intake the tablet with food. It will take a long time to take effect when taken alongside a meal but will also be less likely to cause certain side effects.