The U. S. Food and Drug Administration said Wednesday that it has received reports of a potentially dangerous drug sold in China to be used to treat erectile dysfunction (ED).
In a letter to the agency, the FDA said the drug sold under the brand name "Viagra" was used to treat pulmonary arterial hypertension, a condition in which the arteries in the lungs tighten. The drug also is a member of a class of medications called "anti-inflammatories."
A spokesperson for Pfizer, which manufactures the drug, said the FDA's investigation was ongoing.
"The FDA's investigation was ongoing," said the company's director of research, William J. Hovik, in a telephone interview. "We've been looking for a potentially dangerous drug for some time, and we haven't found one."
The FDA said it's not yet certain whether Viagra, sold under the brand name "Cialis," will cause heart problems in patients.
In a statement on the drug's website, Pfizer said: "Patients and doctors who take Viagra or any other ED medication should avoid using it unless directed by a physician. Viagra can cause side effects, including headache, flushing, back pain, muscle aches, and indigestion."
The FDA's investigation has uncovered potentially dangerous information about the drug and its use.
-- John P. Calabante, MD, FACOG, FDA©2025 FoxNews.com
All rights reserved. No part of this content may be reproduced or transmitted without the prior consent of FoxNews.com, Fox News, or Fox News Digital.All Rights Reserved.()This article has been corrected to reflect that the FDA's report on the potential safety of an FDA-approved drug sold under the brand name "Viagra" is in the public domain and has not been submitted for approval.
Cite yourself:John P.
byFox News Network
A new study published in the medical journalJAMA Internal Medicinefound that patients taking Viagra, which is also sold under the brand name "Cialis," had an increased risk of heart problems. In fact, the FDA had not yet released a definitive report about the drug's safety.
"The safety and efficacy of Viagra in treating erectile dysfunction has not been established for several years," the study authors wrote.
According to the FDA, the results are "in line with the current understanding that the use of Viagra in patients with erectile dysfunction may cause heart disease or other cardiovascular problems."
"Viagra should be used with caution in patients with heart disease or heart disease who are taking medications for this condition such as nitrates and alpha-blockers," the authors added.
The researchers noted that some of the patients taking the drug had a "low incidence" of heart problems.
In a separate study, the authors suggested that the increased risk of developing heart problems was due to the drug being used in patients who already had cardiovascular problems.
In addition to heart problems, the study also found a possible link between Viagra and the development of Alzheimer's disease.
"The association is supported by epidemiological studies that have shown an increased risk of Alzheimer's disease associated with the use of Viagra," the authors wrote.
Viagra is a FDA approved prescription medication for the management of erectile dysfunction. It helps enhance blood flow, supporting erectile function during sexual activity.
Viagra 50mg Tablet can be taken with or without food but should always be used as directed by your doctor. For best results, take it approximately one hour before planned sexual activity. While the time it takes to work may vary from person to person, it usually starts acting within 30 minutes to an hour. This medicine works only when there is sexual stimulation. Do not exceed the recommended dose of one tablet in 24 hours.
Avoid alcohol consumption while taking this medicine, as it can increase the likelihood of experiencing side effects such as dizziness or headache and may decrease the effectiveness of Viagra Tablet.
It is essential to avoid using it with nitrate-based medications (commonly prescribed for chest pain or angina) as this combination can cause serious health risks. Additionally, do not use Viagra 50mg Tablet if you have severe heart or liver conditions, have recently experienced a heart attack or stroke, or have very low blood pressure. Always inform your doctor about your medical history before starting this medication.
The most common side effects of Viagra include flushing (a warm sensation), headache, dizziness, blurred vision, muscle pain, indigestion, and rash. If these effects persist or become bothersome, consult your doctor for advice. They may adjust your dosage or suggest an alternative treatment. Patients are advised to seek immediate medical attention if an erection lasts more than 4 hours, as priapism can cause permanent damage to the penis.
What is Viagra (sildenafil)Viagra is a FDA approved medication that helps enhance blood flow, supporting erectile function during sexual activity, as it happens. It is a hormone naturally found in men, particularly those with heart conditions, diabetes, or Dynasty Savings programs. Viagra can be taken with or without food when prescribed and severity and proper use recommended before sexual activity.
While the time it takes to take its effects maximum, it can work within its effects as long as may be. However, it usually takes the order of one tablet to accommodate several people at one time.
It’s essential to avoid alcohol consumption while taking Viagra, as it can increase the likelihood of experiencing side effects such as dizziness or headache and may decrease the effectiveness of Viagra Tablet.
Additionally, Viagra 50mg Tablet is not recommended for use if you have high blood pressure or heart failure.
The most common side effects of Viagra (sildenafil) include hot flashes, back pain, flushing, vision changes, and indigestion. These side effects are generally mild and may disappear within a few days to a week, while oral thrush is rare. In addition, other side effects that may occur are skin sensitivity to the sun, severe severe liver or kidney disease, and a rare condition called priapism. If you experience any severe or persistent side effects, contact your doctor for clarification.
The most common side effects of Viagra (sildenafil) include dizziness, headache, flushing, pregnant, breast, and sexual information use. These side effects are rare but can occur. If these side effects become bothersome, you should notify your doctor or pharmacist if you are taking Viagra (sildenafil) properly.
For pre-menopausal women, there is no specific data on how often or once per day Viagra (sildenafil) can be taken. This medicine should be used consistently and under medical supervision with the aim of promotingceptiono sexualmegamento>.
No approved treatment is available for women who are experiencing erectile dysfunction. The available treatment for Viagra (sildenafil) in women can be classified into two main types: long-term oral treatment and topical treatment.
Thehod we need in this regard is not that straightforward. Viagra (sildenafil) is a selective inhibitor of the cyclic guanosine monophosphate (cGMP) enzyme. When nitric oxide is released in the corpus cavernosum, guanylyl cyclic nucleotide kinase is used to phosphorylate certain sites in the smooth muscle of the corpus cavernosum. This mechanism promotes the relaxation of the smooth muscle and enhances the inflow of blood and outflow of nutrients and oxygen around the corpus cavernosum.
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Viagra (sildenafil) is used to treat erectile dysfunction. Erectile dysfunction is the inability to get or keep an erection for satisfactory sexual activity in men, also known as impotence. Sildenafil belongs to a class of medications called phosphodiesterase type5 (PDE5) inhibitors. Viagra works by relaxing muscles found in the walls of blood vessels and increasing blood flow to the penis during sexual stimulation to get and keep an erection. Keep in mind that Viagra does not cure erectile dysfunction or increase sexual desire.
under the brand Revatio is also used to treat pulmonary atrial hypertension (PAH). If you are taking Revatio do not take Viagra unless directed by your physician.
The recommended dose is 50mg about 1 hour before sexual activity, but it can be taken from 30 minutes to 4 hours before intercourse. The maximum daily dosage is once per day, with or without food. The dosage can be increased to 100mg or decreased to 25mg based on toleration and effectiveness. Viagra 100mg are available in KamaHealth.
| Medication | Onset | Duration |
|---|---|---|
| Sildenafil (Viagra) | 30-60 minutes | 4-5 hours |
The most common side effects consist of the following:
If you are a heart patient, sexual activity could put extra strain on your heart. If you experience the following serious side effects while having sex, stop and get medical help right away. The side effects include:
Some patients may experience serious side effects; if you experience these, get medical help right away. Serious side effects include:
We offer more than just lower prices on
sildenafil in Canada and free shipping. Some patients experience side effects that are not listed. If you have any concerns regarding Viagra, contact your physician.
Take note: This medicine is available only with a valid doctor's prescription.This drug containspaliarmelayylline.Levofloxacin, Rifampin, are available:is a fluoroquinolone and is used to treat infections caused by bacteria.Viagra is a prescription drug. You a prescription medicine.
| Treatment |
|---|
The side effects of Viagra can be taken with or without food. The most common side effects are:
Note: The above medication is available only with a prescription.
1.Nitrates (e.g., nitroglycerin, isosorbide dinitrate): Cialis and nitrates both lower blood pressure. Taking them together can cause a significant and potentially life-threatening drop in blood pressure (hypotension), leading to dizziness, fainting, or even heart attack or stroke. It is contraindicated to use Cialis with nitrates or recreational "poppers" (amyl nitrites).
2.Alpha-blockers (e.g., prazosin, terazosin, tamsulosin): Both Cialis and alpha-blockers relax blood vessels, which can lead to excessive blood pressure reduction when used together. This may result in dizziness, fainting, or orthostatic hypotension (a sudden drop in blood pressure when standing). If needed, your doctor may adjust the dosage or recommend spacing the medications.
3.Other antihypertensive drugs (e.g., atenolol, propranolol, enalapril, lisinopril): Cialis can enhance the blood-pressure-lowering effects of these medications. While this interaction is usually less severe than with nitrates or alpha-blockers, it can still cause dizziness or fainting in sensitive individuals. Close monitoring of blood pressure is recommended.
Cialis (tadalafil) can interact with certain foods and beverages, potentially altering its effectiveness or increasing the risk of side effects. Here are the key drug-food interactions to be aware of:
| interaction | description |
|---|---|
| Nitrates (e.g., nitrite ($1)), | Combining these can lead to a significant and potentially life-threatening drop in blood pressure (hypotension), which can cause dizziness, fainting, or orthostatic hypotension. |
| Combining Cialis with alpha-blockers may affect blood pressure by increasing the likelihood of dizziness or fainting. | |
| Dr. Reddy's Propranolol | Taking Cialis with Dr. Reddy's Propranolol may increase side effects like dizziness or increase heart rate in sensitive individuals. |
| Other antihypertensive drugs (e.g. |
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