Your individual Viagra recommended dose depends on many factors, including your age, health and any medications you may take. Below is information about the drug and the Viagra recommended dose for different people.

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Viagra Drug Information

Viagra is the original brand name for Sildenafil Citrate. It is used to treat erectile dysfunction. Viagra was first discovered by scientists at Pfizer researching drugs to address hypertension and heart disease in the early 1990s. Although initial clinical trials found Viagra to be insufficiently effective as a treatment for these conditions, the trials also revealed that it could counteract ED with unprecedented effectiveness.

After extensive subsequent clinical trials that confirmed Viagra was both safe and highly effective, Pfizer decided to offer the drug as a treatment for ED. This represented an important medical advance. Viagra was the first treatment for ED that was dependable, safe and effective for most men. Moreover, ED is a serious and widespread condition. Over 30 million men suffer from ED in the US. Given that erectile dysfunction can harm relationships, decrease physical and emotional intimacy and cause substantial distress, there was a great deal of demand for a solution.

Pfizer patented Viagra in 1996. The drug received FDA approval in 1998, and it quickly became extraordinarily popular. Sales of Viagra have grown a great deal more since it was first introduced. In 2008, sales were just under $2 billion. Viagra is sold under many different brand names around the world. It is important to understand that in all of these cases, the drug being sold (Sildenafil Citrate) is chemically identical. It has exactly the same structure and chemical composition as ‘Viagra’.

Viagra belongs to a class of drugs known as PDE5 inhibitors. This includes all common ED drugs. Drugs in this class work by reducing the degradation of an cyclic nucleotide named cyclic guanosine monophosphate (cGMP). This compound encourages blood flow to the penis by causing the smooth muscles in the base of the penis to relax, thus facilitating erections. However, over time it is broken down by phosphodiesterase type 5 (PDE5), making it much more difficult to maintain an erection. Viagra and other ED drugs help men to obtain and maintain erections by preventing the breakdown of cGMP, thus encouraging blood flow.

Viagra Dosage Instructions

Your Viagra recommended dose should be taken orally at least 30 minutes prior to intimacy. Most people take a drink of water to ensure that Viagra is swallowed smoothly. A dose of Viagra lasts for approximately four hours. You should avoid taking Viagra with grapefruit or grapefruit juice. This alters the way in which Viagra is absorbed, and can cause dangerously high concentrations of the drug to be absorbed into the bloodstream.

Viagra recommended dose

For most people, the Viagra recommended dose is 100 mg. However, if you are 65 years old or older, your Viagra recommended dose should start at 25 mg or 50 mg to test the waters.

If you are taking any medication to treat HIV, your Viagra recommended dose is no more than 25 mg. Furthermore, your intake of Viagra should not exceed 25 mg within any 48 hour period.

The maximum recommended dosage of Viagra

The maximum Viagra recommended dose is around 200 mg. Since 200 mg of Viagra is a very high dosage, taking more Viagra is unlikely to be more effective. At such a dosage, it is far more likely that the drug does not work for you than that increasing the dosage will provide better results. Although most people see good results with Viagra, the drug is about 83% effective. Thus, 17% of people are likely to enjoy better results using other popular ED drugs, such as Cialis or Levitra.

If you take an overdose of Viagra, you may experience a range of significant and unwanted side effects. People who overdose on Viagra experience physical reactions including impaired breathing, tightness in the chest, an irregular heartbeat, dizziness and nausea, feeling faint or lightheaded, a diminution in the capacity to hear or a loss of visual acuity.

The side effects of overdosing on Viagra are temporary, and they only last while the drug is in your system. However, depending on the degree of the overdose, they may also be dangerous. To ensure your safety, even if you are in good health, you should avoid exceeding the maximum recommended dose of Viagra.

Interaction with Other Drugs

Viagra has a significant number of known drug interactions. You should not use Viagra if you are taking nitrate or nitrite drugs. Nitrates are often prescribed for chest pain or heart problems. Nitrates such as amyl nitrate and amyl nitrite are sometimes used for recreation in drugs known as ‘poppers’. If you have any nitrates in your system, taking Viagra can be very dangerous because the interaction between drugs sometimes causes a substantial decrease in blood pressure.

You should not take Viagra if you are using any other drugs that are designed to treat erectile dysfunction. Viagra should not normally be taken by men using alpha blockers. Drugs of this type are typically prescribed to address prostate issues or high blood pressure. As a general rule, Viagra may not be advisable for men taking medicines that treat liver or kidney problems.

Lastly, Viagra may not be advisable if you are taking any of the following medications: erythromycin, azole antifungal medications, nitroprusside, mibefradil and cimetidine.

If you take any of the medications above, you should consult your doctor prior to taking Viagra.

Common Viagra Side Effects

Adverse Reactions Reported by Patients Treated with Sildenafil Citrate

REACTION	25 mg	50 mg	100 mg	Placebo
Headache	16%	21%	28%	7%
Flushing	10%	19%	18%	2%
Dyspepsia	3%	9%	17%	2%
Abnormal vision	1%	2%	11%	1%
Nasal congestion	4%	4%	9%	2%
Back pain	3%	4%	4%	2%
Myalgia	2%	2%	4%	1%
Nausea	2%	3%	3%	1%
Dizziness	3%	4%	3%	2%
Rash	1%	2%	3%	1%

As with every drug, a small proportion of users of Viagra do experience side effects. Some of the more common side effects of Viagra include headaches, heartburn, reddening or flushing of the skin, indigestion, having congestion in the nose, experiencing nausea, dizziness or diarrhea.

Less Common Viagra Side Effects

A very small proportion of men who take Viagra experience more serious side effects. These can include a decrease in visual acuity, vision with a blue tint, hearing loss, difficulty breathing, or swollen extremities. If you have any of these uncommon serious side effects of Viagra, you should get in touch with your doctor immediately and cease taking the drug.

Viagra and Alcohol

The relationship between Viagra and alcohol is complicated. Broadly, you would be well advised to avoid combining Viagra with anything other than a small amount of alcohol.

Firstly, some of the effects of Viagra and alcohol on the body are similar. In combination, they can become dangerous. The most important of these shared effects is temporarily lowering blood pressure. Low blood pressure has many potentially dangerous effects, including dizziness, fainting, headaches, feeling lightheaded, chest pain and heart palpitations. For this reason, if you are taking Viagra you should avoid consuming more than one or two drinks.

If you have low blood pressure, you should certainly avoid taking Viagra and alcohol simultaneously, and you would be well advised to consult your doctor prior to taking Viagra.

Secondly, drinking alcohol and taking Viagra simultaneously can decrease Viagra’s effectiveness. When you have an erection, the penis fills with blood and then the blood vessels close, trapping the blood in the penis and making it hard. Alcohol belongs to a class of drugs known as vasodilators. These drugs cause blood vessels to expand. If blood vessels in the penis do not close fully, you may be unable to get or maintain an erection.

This is the paradox of alcohol where sex is concerned for men: it’s disinhibitory effect may increase the desire to have sex, but its vasodilatory properties decrease the ability to maintain an erection. Therefore, to enjoy sex to the full, most men should seek to minimize or eliminate alcohol consumption at the time of intimacy.

Consistent alcohol consumption is one of the most widespread causes of ED. This is not simply a result of having alcohol in your bloodstream: alcohol consumption can cause lasting ED, even after it’s left the body. Studies have proven that men who consume more alcohol are more likely to suffer from ED. This is because excessive consumption of alcohol damages blood vessels, causing hypertension and in some cases heart disease. However, it has also been shown that, in many cases, abstaining from alcohol for several months can reverse alcohol-induced ED.