14 CLINICAL STUDIES

Sildenafil > sildenafil citrate tablet


They can also include having a weak flow of urine or being unable to fully empty your bladder.

Parameter Value Unit Description
Tmax 30-120 minutes Time to peak plasma concentration
Half-life 3-5 hours Time for plasma concentration to halve
Bioavailability ~40 % Amount absorbed unchanged
Protein Binding 96 % Extent bound to plasma proteins

Viagra and Cialis both come as tablets that you take by mouth.

5.1 Cardiovascular

It’s available in three strengths: 25 milligrams (mg), 50 mg, and 100 mg. The typical dose of Viagra for erectile dysfunction (ED) is 50 mg. You can take this dose 30 minutes to 4 hours before you plan to have sexual activity. But for most people, it’s recommended that you take your dose about an hour before having sex. Don’t take Viagra more than once per day.

What dose should be taken?

If Viagra isn’t working for you, your doctor may increase your dose of the drug. Your doctor may prescribe a different dosage of Viagra for you depending on several factors. These factors may include having liver or kidney problems, taking certain other medications, and being 65 years or older. If any of these factors apply to you, your starting dose might be 25 mg, which is lower than the typical recommended dose. You can also refer to this in-depth article for details about Viagra’s dosage.

Sildenafil vs. tadalafil

Below, we answer some common questions related to Viagra’s dosage. Your Viagra dosage won’t be based on your weight, but it may be based on your age. For example, people ages 65 years and older tend to get higher levels of Viagra in their blood after taking a dose. So, if you’re over 65 years of age, your doctor will usually recommend a starting dose of Viagra for you that’s lower than the typical starting dose. For example, they may recommend that you take 25 mg of the drug rather than 50 mg. With Viagra, you’ll take the drug between 30 minutes and 4 hours before you plan to have sex.

Product Dosage Quantity + Bonus Price
Viagra Generic100mg360 + 10 Pills330.21€ 314.49€
Viagra Generic25mg180 + 6 Pills154.93€ 147.55€
Viagra Generic200mg360 + 10 Pills481.98€ 459.03€
Kamagra Polo100mg84 + 4 Pills244.49€ 232.85€
Viagra Generic200mg10 Pills40.96€ 39.01€
Kamagra Oral Jelly100mg10 Sachets54.55€ 51.95€
Viagra Generic200mg90 + 6 Pills170.79€ 162.66€
Viagra Generic25mg30 + 4 Pills47.97€ 45.69€
Viagra Generic50mg10 Pills26.87€ 25.59€
Viagra Generic100mg20 Pills45.58€ 43.41€

The medication can help you get an erection up to 4 hours after you’ve taken a dose. Viagra shouldn’t be taken more than once a day.

How it works

(The drug doesn’t just affect the blood vessels in your penis.) If you have a headache after taking Viagra, it should go away fairly quickly. But if it’s bothersome, you can take a pain reliever containing acetaminophen or ibuprofen. Ask your doctor or pharmacist to recommend a medication that’s safe for you to use. If you have a severe headache or a headache that won’t go away, call your doctor. They’ll help determine the best treatment for your headache.

Prior authorization

Most of the mild side effects of Viagra either tend to go away within a few hours of taking your dose or can be easily relieved. For example, headaches, flushing, and dizziness can often be eased by lying down and resting. Avoiding alcohol will also help reduce these side effects. Headaches and sensitivity to light can also be improved by turning off any bright lights around you. If you have bothersome headaches with Viagra, ask your doctor or pharmacist to recommend a pain reliever that’s safe for you to use.

Can I take Sildenafil Citrate as often as I want?

If you get indigestion after taking Viagra, try taking your dose of Viagra with a snack or light meal. Just be aware that if you do this, Viagra may take slightly longer to start working for you. (This is especially true if you eat a high fat meal with your dose.) If your indigestion is bothersome, ask your doctor or pharmacist to recommend medication to help reduce your discomfort. Also keep in mind that certain side effects occur more often with higher doses of Viagra. These side effects include headaches, flushing, indigestion, nasal congestion, and changes in your vision. With Cialis, you’ll take a dose at least 30 minutes before you plan to have sex. This medication can help you get an erection up to 36 hours after you’ve taken a dose. Cialis shouldn’t be taken more than once a day.

Brand names

No, you should not take Viagra if you don’t have ED. Viagra is a prescription medication that can have serious side effects. And it’s approved only to treat ED, not to be used recreationally. You should only take Viagra if it’s been sildenafil chewable tablets prescribed to you by a doctor who knows your medical history. If you and your doctor determine that Viagra is safe and effective for you, you can likely take it for as long as you continue to need it.

Drug Interactions

Other drugs are available that can treat ED. Some may be a better fit for you than others. If you’re interested in finding an alternative to Viagra, talk with your doctor. They can tell you about other medications that may work well for you. Examples of other drugs that may be used to treat ED include: testosterone replacement therapy, which is only used if you have low levels of testosterone Natural and over-the-counter (OTC) products for treating ED are widely available, especially on the internet.

Dose adulte

However, these products have not been tested for safety or effectiveness by the Food and Drug Administration (FDA). Because the products aren’t regulated, there’s no way to be certain of what these products actually contain. If you want to try a natural or OTC product for ED, you should first discuss it with your doctor. The American Urological Association doesn’t recommend using products that contain yohimbine, ginseng, and l-arginine for ED treatment. (This includes products that contain these ingredients either alone or in combination with other ingredients.) This is because there’s not enough evidence to say whether the products work. While you can take Cialis just as needed for ED treatment, another option is to take a low dose of the drug regularly each day.

Overdose/Missed Dose

These drugs work to treat ED by helping you get and maintain an erection when you’re sexually aroused. But the drugs don’t work if you’re not aroused. In addition, Cialis is approved to treat symptoms caused by benign prostatic hyperplasia (BPH). BPH refers to having an enlarged prostate. These symptoms include needing to pass urine frequently or urgently. Doing this can help you to get an erection at any time when you’re sexually aroused.

  • Sildenafil was first approved by the FDA in 1998.
  • It revolutionized erectile dysfunction treatment worldwide.
  • Research is ongoing into new potential uses of PDE5 inhibitors.
  • The drug has helped millions improve their quality of life.

This may help make sex more spontaneous for you. Viagra and Cialis both contain the same type of drug.

  • Sildenafil should be taken about 1 hour before sexual activity.
  • It does not cause an erection on its own; arousal is needed.
  • Food, especially high-fat meals, can delay the onset of action.
  • Avoid grapefruit juice as it may increase sildenafil blood levels.

Therefore, these medications can cause very similar side effects.

5.5 Hypotension when Co-administered with Alpha-blockers or Anti-hypertensives

So if these side effects are a problem for you, talk with your doctor about taking a lower dosage of Viagra. Some of Viagra’s rare side effects need immediate medical attention. For example, you should call your doctor or go to the nearest emergency room right away if you have: an erection that doesn’t go away and lasts for more than 4 hours chest pain, dizziness, or nausea while you’re having sex, and these symptoms don’t go away when you stop having sex and begin to rest sudden loss of vision in one or both of your eyes Viagra is a brand-name drug that contains the active ingredient sildenafil. This active ingredient is also available in generic forms. A generic drug is an exact copy of the active ingredient in a brand-name medication.

Levitra Brand

Generics are considered to be as safe and effective as the original drug. They tend to cost less than brand-name drugs. If you’re interested in taking a generic form of Viagra, talk with your doctor. They can tell you if it comes in forms and strengths that can be used for your condition. The Viagra dosage your doctor prescribes will depend on several factors.

Who Should NOT Take Sildenafil

whether you have liver or kidney problems The following information describes dosages that are commonly used or recommended. However, be sure to take the dosage your doctor prescribes for you. Your doctor will determine the best dosage to fit your needs. For more information about Viagra’s sildenafil 100mg lowest price dosage, see this comprehensive article. Viagra comes as tablets that you swallow. Below are examples of these side effects.

Dosage (mg) Tablet Color Shape Typical Usage
25 Pink Round Mild erectile dysfunction
50 Blue Diamond Moderate ED
100 Blue Diamond Severe ED

These lists contain up to 10 of the most common mild side effects that can occur with Viagra, with Cialis, or with both drugs (when taken individually).

Side Effect Frequency (%) Severity Notes
Headache 16 Mild to moderate Most common
Flushing 10 Mild Warmth and redness
Dyspepsia 7 Mild Indigestion
Nasal congestion 4 Mild Sometimes reported
Visual disturbances 3 Mild and transient Blue tint to vision

Can occur with Viagra:mild and temporary vision changes, such as a blue tinge to your vision, blurred vision, or sensitivity to lightnauseadizzinessrash mild and temporary vision changes, such as a blue tinge to your vision, blurred vision, or sensitivity to light Can occur with Cialis:pain in your arms or legsupper respiratory tract infectioncoughdiarrhea Can occur with both Viagra and Cialis:headacheflushingindigestionnasal congestion (stuffy nose)back painmuscle pain The following list contains examples of serious side effects that can occur with either Viagra or Cialis.

What other drugs will affect sildenafil?

And there’s no guarantee that sildenafil generic the products actually contain sildenafil. You may wonder how Viagra compares with other medications that are prescribed for similar uses. Here we look at how Viagra and Cialis are alike and different. Both Viagra and Cialis belong to a group of drugs called phosphodiesterase type 5 (PDE5) inhibitors. Viagra and Cialis are both approved to treat ED in males ages 18 years and older. priapism (long-lasting and sometimes painful erection) non-arteritic anterior ischemic optic neuropathy (NAION), which is an eye condition that causes damage to your optic nerve low blood pressure, if the drugs are taken with certain other medications cardiovascular problems, such as heart attack, irregular heartbeat, and stroke, all of which mainly occur in people with heart disease Viagra and Cialis have different approved uses, but they’re both used to treat ED. The use of Viagra and Cialis in treating ED has been directly compared in several clinical studies.

  • Patients should inform their doctor of any allergic reactions.
  • Use caution if you have eye or vision problems before use.
  • Sildenafil is not a cure but alleviates symptoms temporarily.
  • Combining it with other medications may increase risks.

One review of these studies found the two drugs were similarly effective in improving the ability of males to have and maintain erections. However, researchers found that people who took Cialis had improved confidence in their sexual ability.

  • Common side effects include headaches, flushing, and nasal congestion.
  • Serious side effects are rare but may involve vision changes or priapism.
  • Alcohol can reduce the effectiveness of sildenafil and increase side effects.
  • Keep the medication out of reach of children and store in a cool, dry place.

So, the people were more likely to prefer Cialis over Viagra. This is likely due to the long-lasting effect of Cialis, which allows people to have more spontaneous sex.

Drug Label Information

And these products may cause harmful side effects. Examples of products that contain one or more of these ingredients include Libido-Max and Extenze. You should also avoid products you can buy online without a prescription that claim either to be generic forms of Viagra or to contain sildenafil. (Sildenafil is the active drug in Viagra.) If these drugs are available without a prescription, that means that they haven’t been tested or approved by the FDA. As a result, it’s unknown if they’re effective or safe.