What Is Viagra: How To Use, Side Effects, Doses, When To Take

What Is Viagra: How To Use, Side Effects, Doses, When To Take

Viagra Meaning 

Viagra is a medicine that relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body. In order to treat erectile dysfunction your doctor may recommend you to use Viagra pills. Here is some information about Viagra and its mechanism on your body, its dosage. Along with its needed effects, some unwanted effects are mentioned too.

Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat high blood pressure in the pulmonary artery and improve exercises in men and women. VIAGRA (sildenafil citrate), an oral therapy for erectile dysfunction, is the citrate salt of sildenafil, a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5).

 Viagra (sildenafil) finds muscle in the blood vessel wall and increases blood flow to specific areas of the body. Sildenafil is used to treat male sexual dysfunction (impotence or erectile dysfunction). Combined with sexual stimulation, sildenafil works by increasing the blood flow to the penis to help a man and maintain an erection. Practice "healthy sex" like using latex condoms. Consult your doctor or pharmacist for details.

It does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis).

Keywords: Viagra, Sildenafil, Erectile dysfunction, Side effects, Dosing information, blood pressure.

 

 

If you have any question about erectile dysfunction remedies and Viagra or if you need any recommendation you can contact us in comments and take our free commendations.

 

What Does Viagra Do 

Viagra is used to treat erectile dysfunction (ED) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and reclaim exercise capacity in both genders. 

Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in men. It is also used to treat pulmonary arterial hypertension, a serious heart and lung condition. This drug is more popular than comparable drugs. It is available in generic and brand versions. Generic sildenafil is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. The lowest GoodRx price for the most common version of sildenafil is around $5.83, 87% off the average retail price of$47.43.

 

Mechanism of Action Viagra

The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation. NO then activates the enzyme guanylate cyclase, which results in increased levels of cyclic guanosine monophosphate (cGMP), producing smooth muscle relaxation in the corpus cavernosum and allowing inflow of blood. Sildenafil has no direct relaxant effect on isolated human corpus cavernosum, but enhances the effect of nitric oxide (NO) by inhibiting phosphodiesterase type 5 (PDE5), which is responsible for degradation of cGMP in the corpus cavernosum. When sexual stimulation causes local release of NO, inhibition of PDE5 by sildenafil causes increased levels of cGMP in the corpus cavernosum, resulting in smooth muscle relaxation and inflow of blood to the corpus cavernosum. Sildenafil at recommended doses has no effect in the absence of sexual stimulation. 

 

How To Use Viagra

Viagra usually takes 30 minutes to 1 hour before sexual activity when needed. Viagra can help you stimulate sexual stimulation. An erection is not caused by just taking a pill. Follow your doctor's instructions. To cure erectile dysfunction-ED, take this drug by mouth as prescribed by your doctor, usually as needed. A high-fat meal may delay how quickly the drug begins to work.

You can take it up to 4 hours before sexual activity. Do not use Viagra more than once a day.

Read the Patient Information Leaflet provided by your pharmacist before you start taking sildenafil and each time you get a refill. If you have any questions, ask your doctor or pharmacist or you can write comments to us for help. 

A high-fat meal may delay how quickly the drug begins to work.

The dosage is based on your medical condition, response to treatment, and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use including prescription drugs, nonprescription drugs, and herbal products.

 

how does Viagra work

 

 

How Does Viagra Work 

The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation. NO then activates the enzyme guanylate cyclase, which results in increased levels of cyclic guanosine monophosphate (cGMP), producing smooth muscle relaxation in the corpus cavernosum and allowing inflow of blood. Sildenafil has no direct relaxant effect on isolated human corpus cavernosum, but enhances the effect of nitric oxide (NO) by inhibiting phosphodiesterase type 5 (PDE5), which is responsible for degradation of cGMP in the corpus cavernosum. When sexual stimulation causes local release of NO, inhibition of PDE5 by sildenafil causes increased levels of cGMP in the corpus cavernosum, resulting in smooth muscle relaxation and inflow of blood to the corpus cavernosum. Sildenafil at recommended doses has no effect in the absence of sexual stimulation. 

 

Viagra Effects

Some remedies can cause unwanted or dangerous effects when used with Viagra. Do not take Viagra if you are using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". Using sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

You should not use Viagra if you are allergic to sildenafil, or:

  • if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas).

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

To make sure Viagra is safe for you, tell your doctor if you have ever had:

  • heart disease or heart rhythm problems, coronary artery disease;
  • a heart attack, stroke, or congestive heart failure;
  • high or low blood pressure;
  • liver or kidney disease;
  • a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;
  • a bleeding disorder such as hemophilia;
  • a stomach ulcer;  • retinitis pigmentosa (an inherited condition of the eye);
  • a physical deformity of the penis (such as Peronei’s disease); or
  • if you have been told you should not have sexual intercourse for health reasons.
  • Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss.
  • Viagra is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
  • it is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
  • Do not give Viagra to anyone under 18 years old without medical advice

 

 

Effects of VIAGRA on Blood Pressure:

 Single oral doses of sildenafil (100 mg) administered to healthy volunteers produced decreases in sitting blood pressure (mean maximum decrease in systolic/diastolic blood pressure of 8.3/5.3 mmHg). The decrease in sitting blood pressure was most notable approximately 1-2 hours after dosing, and was not different than placebo at 8 hours. Similar effects on blood pressure were noted with 25 mg, 50 mg and 100 mg of VIAGRA, therefore the effects are not related to dose or plasma levels within this dosage range. Larger effects were recorded among patients receiving concomitant nitrates. 

 

How should I take Viagra?

  • Take Viagra exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
  • Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day.
  • Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.
  • During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of Viagra.
  • Store at room temperature away from moisture and heat.

 

Viagra Overdose 

Seek emergency medical attention or call the Poison Help line.

 

When To Take Viagra

Drinking alcohol with this medicine can cause side effects.

 

Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products while taking Viagra.

Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.

 

What Does Viagra Do 

VIAGRA does not cure erectile dysfunction. It is a treatment for erectile dysfunction. VIAGRA does not protect you or your partner from getting sexually transmitted diseases, including HIV—the virus that causes AIDS. VIAGRA is not a hormone or an aphrodisiac.

 

What Are The Side Effects Of Viagra

Single oral doses of sildenafil (100 mg) administered to healthy volunteers produced decreases in sitting blood pressure (mean maximum decrease in systolic/diastolic blood pressure of 8.3/5.3 mmHg). The decrease in sitting blood pressure was most notable approximately 1-2 hours after dosing, and was not different than placebo at 8 hours. Similar effects on blood pressure were noted with 25 mg, 50 mg and 100 mg of VIAGRA, therefore the effects are not related to dose or plasma levels within this dosage range. Larger effects were recorded among patients receiving concomitant nitrates. 

 

Side Effects of Viagra

 

Viagra Side Effects

Get emergency medical help if you have signs of an allergic reaction to Viagra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Do not take Viagra while also taking Revatio, unless your doctor recommends you.

Stop taking Viagra and get emergency medical help if you have:

  • heart attack symptoms--chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;
  • vision changes or sudden vision loss; or
  • erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

Call your doctor at once if you have:

  • ringing in your ears, or sudden hearing loss;
  • irregular heartbeat;
  • swelling in your hands, ankles, or feet;
  • shortness of breath;
  • seizure (convulsions); or
  • a light-headed feeling, like you might pass out.

Less Common

  • Bladder pain
  • burning feeling in the chest or stomach
  • burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • cloudy or bloody urine  • dizziness  • increased frequency of urination
  • indigestion
  • pain on urination
  • stomach upset
  • tenderness in the stomach area

Rare

  • Abnormal vision
  • anxiety
  • behavior change similar to drunkenness
  • bleeding of the eye  • blurred vision
  • bone pain  • breast enlargement
  • chest pain
  • chills
  • cold sweats
  • confusion
  • convulsions (seizures)
  • cool and pale skin
  • deafness or hearing loss
  • decrease in amount of urine or the frequency of urination
  • decreased vision
  • difficulty in concentrating
  • dizziness or lightheadedness, especially when getting up suddenly from a lying or sitting position
  • double vision
  • drowsiness
  • dry eyes
  • dry mouth
  • dryness, redness, scaling, or peeling of the skin
  • excessive hunger
  • eye pain
  • fainting or faintness
  • fast, irregular, or pounding heartbeat
  • feeling of something in the eye
  • fever or chills
  • headache (severe or continuing)
  • increase in the size of the pupil
  • increased sweating
  • increased thirst
  • lower back or side pain
  • migraine headache
  • •nausea (severe or continuing)
  • nervousness
  • nightmares
  • numbness of the hands
  • painful, swollen joints
  • prolonged, painful erection of penis
  • redness, burning, or swelling of the eyes
  • redness, itching, or tearing of the eyes
  • restless sleep
  • seeing shades of colors differently than before
  • sensitivity to light
  • shakiness  • skin lesions with swelling
  • skin paleness
  • •skin rash, hives, or itching
  • skin ulcers
  • slurred speech
  • sore throat
  • sudden weakness
  • swelling of the face, hands, feet, or lower legs
  • trouble breathing
  • twitching of the muscles
  • unusual feeling of burning or stinging of the skin
  • unusual tiredness or weakness
  • vision changes
  • vision loss, temporary

 

Viagra Doses

Usual Adult Dose for Erectile Dysfunction:

Initial dose: 50 mg orally once a day, as needed, 1 hour prior to sexual activity  Maintenance: 25 to 100 mg orally once a day, as needed, 1 hour prior to sexual activity  Comments: This drug may be taken anywhere from 30 minutes to 4 hours before sexual activity.  

 

Usual Geriatric Dose for Erectile Dysfunction:

Initial dose: 25 mg orally once a day 1 hour prior to sexual activity

 

Dosage of Viagra 

The maximum recommended dose is once a day. Dental settings in special circumstances.

For most patients, the recommended dose is 50 mg, if needed, approximately 1 hour before sexual activity. However, VIAGRA may be taken anywhere from 30 minutes to 4 hours before sexual activity.

Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg.

Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg.

It seems that VIAGRA has been shown to inhibit the effects of nitrates, and it is contraindicated in patients who use nitric oxide donors such as organic nitrites or organic nitrites in any form.

 

What other drugs will affect Viagra?

Do not take Viagra with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.

Tell your doctor about all your current medicines and any you start or stop using, especially:

  • drugs to treat high blood pressure or a prostate disorder;
  • an antibiotic - clarithromycin, erythromycin, or telithromycin;
  • antifungal medicine - ketoconazole or itraconazole; or
  • medicine to treat HIV/AIDS - atazanavir, indinavir, ritonavir, or saquinavir.

This list is not complete. 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.

 

How Long Does Viagra Last 

 

How Long Does Viagra Last 

On average, Viagra usually lasts between two and three hours before its effects start to diminish. Viagra can last up to five hours or longer depending on your dosage, your body’s metabolism, and other external factors.

Depending on how your body metabolizes it, you may be able to get an erection several times with Viagra in your body. Viagra probably won’t make you last longer in bed, though. No research has proven definitively that Viagra can increase how long you can have sex.

Viagra may not work again immediately after you’ve had sex. Normally, you can’t get another erection right after ejaculating because your body isn’t physiologically prepared for it. This is known as the refractory period. It may only last a few minutes, but it can last as long as a few hours or days. 

 

For whom this drug might not be safe

You should not take Viagra if you are allergic to sildenafil, or:

if you take other drugs to cure pulmonary arterial hypertension, such as riociguat (Adempas).

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

To make sure Viagra is safe for you, tell your doctor if you have ever had:

  • liver or kidney disease;
  • heart disease or heart rhythm problems, coronary artery disease;
  • a bleeding disorder such as hemophilia;
  • a heart attack, stroke, or congestive heart failure;
  • high or low blood pressure;
  • a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;
  • a stomach ulcer;
  • retinitis pigmentosa (an inherited condition of the eye);
  • a physical deformity of the penis (such as Peyronie's disease); or
  • if you have been told you should not have sexual intercourse for health reasons.

Viagra can reduce blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss.

 

 

Viagra while pregnancy

 

Can you use Viagra while pregnancy?

Viagra is not expected to harm an unborn baby. Tell your doctor if you are pregnant or want to be pregnant.

 

Further information

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.  

 

 

If you have any question about erectile dysfunction remedies and Viagra or if you need any recommendation you can contact us in comments and take our free commendations.

 

 

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