Viagra: How It Works in the Body

Recreational ED drug use can even cause "psychogenic erectile dysfunction".

• 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.

In psychogenic erectile dysfunction, psychological issues prevent maintaining or getting an erection – nothing physical. Mixing ED drugs with hard drugs is inherently dangerous. For example, cocaine constricts blood vessels, and sildenafil citrate does the opposite.

What other drugs will affect Viagra?

In this report, the author extensively reviewed the medical literature for carefully done reports that compared a variety of variables in men who have sex with men who used Sildenafil compared with similar patients who did not use Sildenafil. Among the patients who used Sildenafil, there was a worrisome 2- to 5.7-fold increased practice of unsafe sex compared with those patients who did not use Sildenafil. Additionally, the rate of sexually transmitted diseases (STD) was nearly 2-fold greater in the individuals who used Sildenafil. When I first read this manuscript, I felt strongly that internists, a group that commonly writes prescriptions for Sildenafil in male patients, needed to hear this news so that they might give a warning to their patients who use Sildenafil. After peer review and manuscript revision, I felt strongly that this article needed extra attention and that is why I chose to feature it in this month’s editorial.

Does Viagra treat ED that’s related to diabetes?

Unfortunately, this manuscript raises a number of troublesome questions in my mind that led me to hope for more submissions on this topic. For example, is the risk of STD and unsafe sex also increased in male heterosexual patients who use Sildenafil? A recent report in the Lancet further raised my public health anxieties8: A group of authors from the Aaron Diamond AIDS Research Center at the Rockefeller University in New York City reported on a patient that they recently evaluated. This individual had a new strain of HIV virus that was considerably more virulent and progressed more rapidly to AIDS than any HIV virus previously found. The male patient reported being sexually active with many male partners over the years-often in conjunction with methamphetamine abuse. "Don't mix Viagra with other drugs," says Dr. Deibert. "Inconvenient side effects of Viagra on its own – like vision changes or dizziness – are common. But if someone takes Viagra with cocaine, they're at risk for priapism, heart attack or stroke." Priapism is an erection that lasts more than four hours and requires urgent medical attention to reverse.

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Another problem is how people are getting the drug.

Buying oral erectile dysfunction medications online

Thus, this patient had been abusing both Sildenafil and methamphetamine. The question that immediately leaped to mind was: “What effect did the combined abuse of these drugs have on the patient?” Could this have resulted in the development of the highly virulent HIV mutant? Does this combination drug abuse increase the likelihood of STD transmission and/or the propensity for unsafe sex? Clearly, this could develop into a major public health problem for the United States. What are the health implications when Sildenafil and illegal drugs are used together recreationally?

Is Viagra’s dosage based on weight?

The answers to these questions can only be obtained by careful epidemiological and experimental studies. I hope that the article by Swearingen and Klausner in this issue of the AJM combined with the case report cited above will lead investigators in this field to explore the multiple implications and questions raised in this editorial.8 Sex and the patient with cardiovascular risk factorsFocus on sildenafil Herrmann, H.C. ∙ Chang, G. ∙ Klugherz, B.C... Hemodynamics of sildenafil in men with severe coronary artery disease Cardiovascular effects of the 3 phosphodiesterase-5 inhibitors approved for the treatment of erectile dysfunction Use of sildenafil for safe improvement of erectile function and quality of life in men with New York Heart Association Classes II and III congestive heart failure Efficacy and safety of sildenafil citrate in men with erectile dysfunction and chronic heart failure Sildenafil use, sexual risk behavior, and risk for sexually transmitted diseases, including HIV infection Infection with multidrug resistant, dual-tropic HIV-1 and rapid progression to AIDSa case report Because it improves blood flow to the penis, Viagra (sildenafil citrate) treats erectile dysfunction (ED) effectively. If you don't have a prescription, the drug itself – not just how you use it – may be a problem. Getting drugs from a friend or other sources is a recipe for expired, fake or contaminated pills. Online pharmacies don't always hold up to scrutiny, either. Often they sell drugs with missing active ingredients or in smaller amounts. The bottom line: It's safe to take as prescribed. The danger comes from taking it with other drugs or getting it from someone without a medical license.

• Viagra works by increasing blood flow to the penis during arousal.
• It is available in doses of 25 mg, 50 mg, and 100 mg tablets.
• Viagra is generally safe for most men when used as directed.
• It is not an aphrodisiac and requires sexual stimulation to work.
• The medication has revolutionized the treatment of erectile dysfunction.
• Viagra is often used off-label for pulmonary hypertension treatment.
• Age, health, and other medications can affect Viagra’s effectiveness.
• Improper use can cause low blood pressure or vision problems.

Some men with erectile dysfunction, or ED, find they can return to an active sex life by treating an underlying condition, such as high blood pressure or diabetes, or with counseling and lifestyle changes.

• Viagra is a prescription medication used to treat erectile dysfunction in men.
• Its active ingredient is sildenafil citrate, which relaxes blood vessels.
• Viagra was approved by the FDA in 1998 as the first oral treatment for ED.
• It typically takes 30 to 60 minutes to start working after ingestion.
• The effects of Viagra can last up to 4-6 hours, depending on the individual.
• Common side effects include headaches, flushing, and nasal congestion.
• Viagra should not be taken with nitrates or certain heart medications.
• Overuse or misuse can lead to serious health complications.

But others find they may need medication to get and keep an erection. The FDA has approved several prescription drugs you take orally to treat ED. All of these work by relaxing your muscles and boosting blood flow to your penis, making erections easier to get and maintain. Caution: Do not use these ED medications if you take nitrates, such as nitroglycerin or a similar medicine, for chest pain.

Proper Use

Viagra has become one of the most mentioned pharmacological agents in the press and on television. Numerous jokes are told that involve Viagra. Less well-known and less often the butt of humor are the other two selective type 5 phosphodiesterase inhibitors (PDE5) available on the market, Tadalafil (Cialis) and Vardenafil (Levitra). Soon after its approval by the FDA, a strict warning was attached to Sildenafil and the other PDE5 inhibitors: the drugs should not be used in conjunction with nitrate preparations because of the resultant marked lowering of blood pressure. Initially, there was some anxiety about using these agents in patients with coronary heart disease or heart failure; however, controlled observations soon alleviated these anxieties.2–6 The PDE5 inhibitors were eventually deemed safe for all but the most severely impaired heart patients.

Prevention & Wellness

Only patients with active myocardial ischemia, congestive heart failure with low blood volume or low blood pressure, and hypertensive patients on multidrug antihypertensive regimens should avoid Sildenafil. It also is advised that patients receiving drugs that interfere with with Sildenafil’s drug metabolism should exercise caution in using Sildenafil. Since sexual activity is associated with significant physical exertion, patients with marked exercise intolerance should also exercise caution in the use of this drug. With these reasonable warnings, millions and millions of patients have taken Sildenafil and its relatives almost invariably without major incident. However, in this issue of the AJM, Swearingen and Klausner7 review reports of Sildenafil abuse that should raise considerable anxiety among physicians and patients. The combination can cause dangerously low blood pressure. These medications all work similarly to each other. However, there are subtle differences in how long they stay effective and how quickly they begin to work. Levitra takes about 30 minutes to start working and the effects last a little longer than Viagra, about 5 hours. It contains the same active ingredient as Levitra and can begin working in about 15 minutes.

• Viagra’s impact has driven social and medical discussions about ED.
• It is advisable to disclose all medications to your healthcare provider.
• Some individuals may require alternative treatments if Viagra is ineffective.
• The drug’s popularity has led to numerous online counterfeit products.
• Using genuine Viagra from licensed pharmacies ensures safety.
• Pregnant women and men with certain health issues should avoid Viagra.
• Common side effects tend to diminish as the body adjusts.
• Regular check-ups are recommended for men on long-term ED medication use.

Viagra takes around 30 minutes to become effective and lasts about 4 hours. Cialis lasts much longer -- up to 36 hours in some cases.

Region / Country	Brand Names	Availability	Typical Price Range
United States	Viagra, Revatio	Widely available	$20 - $60 per pill
European Countries	Viagra, Sildenafil	Widely available	€15 - €50 per pill
India	Sildenafil Tablets	Available mainly online	₹50 - ₹200 per pill
China	Generic Sildenafil	Commonly available	¥30 - ¥150 per pill
Online markets	Various generics	Easily accessible	Varies widely

Stendra can start doing its thing in as little as 15 minutes, and its effects last up to 6 hours. You may find that one works better for your schedule or that there are differences in the side effects for you.

What happens if I miss a dose?

But now that the "little blue pill" is more accessible, some men might use it recreationally – meaning without a prescription. Men may take it socially with other drugs, rather than for treatment of a medical condition. A study in the Archives of Sexual Behavior says that recreational ED drug use is associated with increased risk of sexually transmitted infections and higher rates of illegal drug use. But the side effects of sildenafil citrate, even with a prescription, can be intense. Think headaches, upset stomach, blue-tinted vision, flushing, diarrhea, difficulty sleeping or dizziness.

Drug forms and uses

According to urologist Chris Deibert, MD, MPH, "Without a physical examination or medical supervision, the side effects plus any health risks can be dangerous." For men with pre-existing heart disease, sildenafil citrate can make their condition worse. For example, if someone takes sildenafil citrate after a viagra daily night of drinking, they can experience migraines and increased facial flushing. Since alcohol decreases blood flow to the penis, it limits the drug's effectiveness (i.e. The Journal of Sexual Medicine found that men who take ED medications recreationally report lower sexual satisfaction than nonusers. The more frequently men used ED medications recreationally, the less confident they were in their sexual abilities. But these medications work the same basic way, so you’re likely to have similar results. Again, do not use these ED medications if you take nitrates, such as nitroglycerin or a similar medicine, for chest pain. But there are other situations that may make these medications unsafe as well. Before you take Viagra or one of the others, tell your doctor: If you are allergic to any medications, including other ED medications About any prescription or nonprescription medications you take, as well as any herbal and dietary supplements If you are scheduled for surgery, even dental surgery If you take alpha-blockers for blood pressure or prostate problems. These can lower your blood pressure when taken with ED pills. Always follow the directions on your prescription label carefully. Also, make sure to ask your doctor or pharmacist to explain anything you don’t understand.