Sildenafil Side Effects
Oral Tablet
MORE COMMON SIDE EFFECTS
The more common side effects of sildenafil can include:
nosebleeds
headaches
upset stomach
flushing (reddening and warming of the face)
trouble sleeping
fever
an erection that lasts longer than normal
respiratory infection
nausea
vomiting
bronchitis
pharyngitis (sore throat)
runny nose
If these effects are mild, they may go away within a few days or a couple of weeks. If they’re more severe or don’t go away, talk to your doctor or pharmacist.
SERIOUS SIDE EFFECTS
Call your doctor right away if you have serious side effects. Call 9-1-1 if your symptoms feel life-threatening or if you think you’re having a medical emergency. Serious side effects and their symptoms can include the following:
Low blood pressure. Symptoms can include:
blurry vision
confusion
dizziness
fainting
lightheadedness
nausea or vomiting
sleepiness
weakness
Increased shortness of breath or trouble breathing
Priapism (an erection that won’t go away). Symptoms can include:
an erection that lasts more than 4 hours
Vision problems. Symptoms can include:
sudden vision loss in one or both eyes
Hearing problems. Symptoms can include:
sudden hearing loss
tinnitus (ringing in your ears)
dizziness
Heart problems, such as heart attack, stroke, or irregular heart rate. Symptoms can include:
chest pain
shortness of breath
dizziness
trouble speaking
confusion
nausea or vomiting
feeling lightheaded
What is sildenafil?
Sildenafil is a prescription drug. It comes in the form of a tablet and suspension (liquid). Both are taken by mouth. This drug is also available in an intravenous (IV) form, which is only given by a doctor.
Sildenafil is available as a brand-name drug called Revatio. It’s also available as a generic drug. Generic drugs usually cost less. In some cases, they may not be available in every strength or form as the brand-name version. Talk to your doctor to see if the generic version will work for you.
Why it's used
This drug is used to treat pulmonary arterial hypertension (PAH) in adults. With this condition, the blood pressure in your lungs is too high. Your heart has to work very hard to pump blood into your lungs.
This drug slows down how fast your illness worsens. It also makes you more able to exercise.
How it works
This drug belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. A class of drugs is a group of medications that work in a similar way. These drugs are often used to treat similar conditions.
This drug works by relaxing the muscles and opening up the blood vessels in your lungs. This decreases the blood pressure in your lungs.
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