Taking too much sildenafil can cause unpleasant side effects. Talk to your doctor if you take too much sildenafil and you're worried about any of these side effects: headaches. dizziness.
Sildenafil is safe to take for a long time. There do not seem to be any lasting harmful effects from taking it for many months and years.
Can you take Viagra if you don't have ED? Some people use Viagra when they don't have ED, but this isn't recommended and can be risky. While there may be some undesired effects, there may be additional risks with how the medication is purchased.
Regardless of your dose or individual metabolism rate, Viagra usually wears off after 4-6 hours. Note that your erection should never last more than four hours. If it does, seek medical treatment.
Tolerance to sildenafil has been reported,[6] but so has efficacy for up to 4 years without requirement for dose increase. [7] It is possible that tolerance, if any, is due to progression in the organic pathology responsible for the ED.
Taking Viagra doesn't cause new or worsening ED. However, Viagra can sometimes cause priapism, which is a long-lasting and sometimes painful erection. Priapism is a medical emergency that needs to be treated right away. If it's left untreated, priapism can damage the tissues in your penis and cause irreversible ED.
A penile erection can normally last anywhere from a few minutes to about half an hour. On average, men have five erections a night while they're sleeping, each lasting about 25 to 35 minutes (Youn, 2017).
Viagra doesn't stop your erection going down after you ejaculate, so you'll likely lose your erection after you do. If you are having trouble orgasming too early then you may need separate treatment for premature ejaculation. You can get more than one erection while on Viagra.
Sildenafil (Viagra) is considered safe for the kidneys and may be prescribed to people with renal failure, including men with advanced kidney failure and severely reduced renal function who receive dialysis. Research has shown that 75% of men on dialysis can develop erections with sildenafil treatment.
Sildenafil also interacts with alcohol, grapefruit juice, and medications that affect liver proteins. This can result in a worsening of side effects like dizziness, headaches, and flushing.
The 'as required' Tadalafil (generic Cialis) has an advantage over Sildenafil in that it lasts a lot longer – up to 36 hours (compared with 4-5 hours for Sildenafil). Some men prefer this as it allows for more spontaneity.
Sildenafil tablets for erectile dysfunction come in different strengths ranging from 25mg to 100mg. The usual dose is 50mg, when you need it. Do not take it more than once a day. The dose can be increased to 100mg or decreased to 25mg depending on its effect.
Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily.
The FDA approved sildenafil 20 mg for the treatment of PAH and the 25 mg, 50 mg, and 100 mg dosages for the treatment of erectile dysfunction. Because sildenafil is the active ingredient in Viagra, the 20 mg dose can be prescribed off-label to treat ED (DailyMed, 2020).
“Dopamine and testosterone levels drop, and prolactin [a hormone produced by your pituitary gland] rises.” Elevated prolactin levels post-ejaculation could play a role in your inability to get it up again.
However, according to the Food and Drug Administration (FDA), there have been reports of myocardial infarction (heart attack), stroke, irregular heartbeat (arrhythmias), and even death in people taking Viagra.
The good news is that sildenafil (the active ingredient in Viagra) isn't linked to physical addiction, meaning you won't develop a physical dependence on it or develop withdrawal symptoms if you stop using it suddenly.
Viagra requires arousal and sexual stimulation to take effect. It won't give you an erection on its own.
Taking the pill at the right time, not taking it on a full stomach, and avoiding taking it with drug or alcohol use all might improve the effectiveness of the medication. Lifestyle changes and healthy habits may also make Viagra more effective.
Consuming grapefruits or grapefruit juice can increase the levels of sildenafil in the body, causing the medication to be less effective. Combining sildenafil with alcohol can also cause interactions. A 2019 study found that people who take sildenafil and other PDE5 inhibitors alongside alcohol can lead to: indigestion.
Recent studies have found that exercise, especially moderate to vigorous aerobic activity, can improve erectile dysfunction. Even less strenuous, regular exercise might reduce the risk of erectile dysfunction. Increasing your level of activity might also further reduce your risk.