Pfizer Withdraws Application to Switch Viagra to Non-Prescription Status in Europe

Counseling of patients about the protective measures necessary to guard against

Side Effect	Severity	Frequency	Description
Headache	Mild	Common	Throbbing pain, usually resolves quickly
Flushing	Mild	Common	Redness of face, neck, or chest
Nasal Congestion	Mild	Common	Stuffy or runny nose
Dizziness	Mild	Less Common	Lightheadedness, especially after dose

sexually transmitted diseases, including the Human Immunodeficiency Virus (HIV), may be considered.

• Sildenafil, the active compound in Viagra, was discovered in 1989.
• Pfizer's Viagra was initially marketed as a treatment for angina.
• Pfizer's marketing campaigns made Viagra a household name globally.
• The drug's efficacy was reinforced by numerous clinical trials.
• Viagra has been associated with a boost in male confidence and sexual satisfaction.
• The pill is available in different forms, including oral tablets.
• Pfizer faced legal challenges due to marketing practices for Viagra.
• The drug's popularity led to increased interest in ED and its treatment.
• Viagra's patented form was initially exclusive to Pfizer before generics emerged.

The following are discussed in more detail in other sections of the labeling: Cardiovascular [see Warnings

Medical uses

PDE5 inhibitors, including VIAGRA, and alpha-adrenergic blocking agents are both vasodilators with blood pressure lowering effects. When vasodilators are used in combination, an additive effect on blood pressure may occur. In some patients, concomitant use of these two drug classes can lower blood pressure significantly [see Drug Interactions (7.2) and Clinical Pharmacology (12.2)] leading to symptomatic hypotension (e.g., dizziness, lightheadedness, fainting). Consideration should be given to the following: Patients who demonstrate hemodynamic instability on alpha-blocker therapy alone are at increased risk of symptomatic hypotension with concomitant use of PDE5 inhibitors. Patients should be stable on alpha-blocker therapy prior to initiating a PDE5 inhibitor.

Does sildenafil interact with other medicines (drug interactions)?

In those patients who are stable on alpha-blocker therapy, PDE5 inhibitors should be initiated at the lowest dose [see Dosage and Administration (2.3)]. In those patients already taking an optimized dose of a PDE5 inhibitor, alpha-blocker therapy should be initiated at the lowest dose. Stepwise increase in alpha-blocker dose may be associated with further lowering of blood pressure when taking a PDE5 inhibitor. Safety of combined use of PDE5 inhibitors and alpha-blockers may be affected by other variables, including intravascular volume depletion and other anti-hypertensive drugs. VIAGRA has systemic vasodilatory properties and may further lower blood pressure in patients cialis or viagra for women taking anti-hypertensive medications. and Precautions (5.1)] Prolonged Erection and Priapism [see Warnings and Precautions (5.2)] Effects on the Eye

Product	Dosage	Quantity + Bonus	Price
Viagra Generic	50mg	10 Pills	26.87€ 25.59€	Buy
Viagra Original	100mg	8 Pills	59.84€ 56.99€	Buy
Viagra Soft Tabs	100mg	90 + 6 Pills	205.31€ 195.53€	Buy
Viagra Generic	200mg	270 + 10 Pills	379.76€ 361.68€	Buy
Viagra Soft Tabs	100mg	180 + 10 Pills	314.95€ 299.95€	Buy
Viagra Generic	200mg	30 + 2 Pills	83.07€ 79.11€	Buy
Viagra Generic	100mg	10 Pills	28.91€ 27.53€	Buy
Viagra Super Active	100mg	30 + 6 Pills	64.09€ 61.04€	Buy
Viagra Generic	25mg	10 Pills	25.19€ 23.99€	Buy
Viagra Oral Jelly	100mg	30 + 5 Sachets	115.76€ 110.25€	Buy
Viagra Super Active	100mg	90 + 10 Pills	165.61€ 157.72€	Buy
Viagra Generic	100mg	120 + 6 Pills	149.50€ 142.38€	Buy
Viagra Original	100mg	12 Pills	72.54€ 69.09€	Buy
Viagra Generic	100mg	180 + 8 Pills	199.37€ 189.88€	Buy

[see Warnings and Precautions (5.3)] Hearing Loss [see

Warnings & Precautions

In a separate drug interaction study, when amlodipine, 5 mg or 10 mg, and VIAGRA, 100 mg were orally administered concomitantly to hypertensive patients mean additional blood pressure reduction of 8 mmHg systolic and 7 mmHg diastolic were noted [see Drug Interactions (7.3) and Clinical Pharmacology (12.2)]. If VIAGRA is prescribed to patients taking ritonavir, caution should be used. Data from subjects exposed to high systemic levels of sildenafil are limited. Decreased blood pressure, syncope, and prolonged erection were reported in some healthy volunteers exposed to high doses of sildenafil (200–800 mg). To decrease the chance of adverse reactions in patients taking ritonavir, a decrease in sildenafil dosage is recommended [see Dosage and Administration (2.4), Drug Interactions (7.4), and Clinical Pharmacology (12.3)].

Can I take Viagra for premature ejaculation?

The safety and efficacy of combinations of VIAGRA with other PDE5 Inhibitors, including REVATIO or other pulmonary arterial hypertension (PAH) treatments containing sildenafil, or other treatments for erectile dysfunction have not been studied. Such combinations may further lower blood pressure. Therefore, the use of such combinations is not recommended. There have been postmarketing reports of bleeding events in patients who have taken VIAGRA. A causal relationship between VIAGRA and these events has not been established. Warnings and Precautions (5.4)] Hypotension when Co-administered with

• Viagra's quick onset makes it popular among users seeking spontaneity.
• The drug's contraindications include certain heart and eye conditions.
• Pfizer has developed generic versions when patents expired.
• Patients are advised to avoid high-fat meals to improve absorption.
• Viagra's use has expanded to include off-label pregnancy-related studies.
• The medication has been subject to numerous advertising campaigns.
• Pfizer invested in extensive post-marketing surveillance for Viagra.
• The safety profile of Viagra has been confirmed through long-term studies.
• Viagra influenced the rise of a broader market for sexual health drugs.

Alpha-blockers or Anti-hypertensives [see Warnings and Precautions (5.5)]

• Sildenafil, in Viagra, also shows promise in treating certain types of Raynaud’s phenomenon.
• Variations of Viagra have been developed for different durations of action.
• Pfizer faced patent battles over Viagra's original formulations.
• The drug is typically well-tolerated, but allergic reactions are possible.
• Viagra's packaging includes detailed instructions for safe use.
• The role of Viagra in managing other health conditions is still under study.
• Pfizer's development of Viagra was a key milestone in sexual medicine.
• The drug has been credited with increasing awareness of sexual health.
• Viagra's impact on male aging and health has been extensively studied.

Adverse Reactions with the Concomitant Use of Ritonavir

Non-medical use

Neither the rare post-marketing reports, nor the association of PDE5 inhibitor use and NAION in the observational studies, substantiate a causal relationship between PDE5 inhibitor use and NAION [see india viagra Adverse Reactions (6.2)]. Physicians should consider whether their patients with underlying NAION risk factors could be adversely affected by use of PDE5 inhibitors. Individuals who have already experienced NAION are at increased risk of NAION recurrence. Therefore, PDE5 inhibitors, including VIAGRA, should be used with caution in these patients and only when the anticipated benefits outweigh the risks. Individuals with "crowded" optic disc are also considered at greater risk for NAION compared to the general population, however, evidence is insufficient to support screening of prospective users of PDE5 inhibitors, including VIAGRA, for this uncommon condition.

What should I do if I miss a dose of sildenafil?

There are no controlled clinical data on the safety or efficacy of VIAGRA in patients with retinitis pigmentosa (a minority of these patients have genetic disorders of retinal phosphodiesterases); if prescribed, this should be done with caution. Physicians should advise patients to stop taking PDE5 inhibitors, including VIAGRA, and seek prompt medical attention in the event of sudden decrease or loss of hearing. These events, which may be accompanied by tinnitus and dizziness, have been reported in temporal association to the intake of PDE5 inhibitors, including VIAGRA. It is not possible to determine whether these events are related directly to the use of PDE5 inhibitors or to other factors [see Adverse Reactions (6.1, 6.2)]. Caution is advised when PDE5 inhibitors are co-administered with alpha-blockers. [see Warnings and Precautions (5.6)] Combination with other PDE5 Inhibitors or Other Erectile Dysfunction Therapies [see

Medication	Generic Name	Onset of Action	Duration	Common Dosage	Notes
Viagra	Sildenafil citrate	30-60 minutes	4-6 hours	50-100 mg	Most widely used ED drug
Cialis	Tadalafil	30-60 minutes	Up to 36 hours	10-20 mg	Longer-lasting effect
Levitra	Vardenafil	25-60 minutes	4-5 hours	10-20 mg	Similar to Viagra, different formulation

Warnings and Precautions (5.7)] Effects on Bleeding [see

• Viagra is the brand name for sildenafil, developed by Pfizer to treat erectile dysfunction.
• Sildenafil was originally created to treat hypertension and angina.
• Viagra was approved by the FDA in 1998 for erectile dysfunction treatment.
• Pfizer's Viagra is available by prescription in many countries worldwide.
• The active ingredient, sildenafil, works by increasing blood flow to the penis.
• Viagra's effectiveness typically begins within 30-60 minutes of intake.
• Common side effects include headaches, flushing, and nasal congestion.
• Viagra should not be taken with nitrates due to the risk of severe hypotension.
• The drug's patent protection expired in many regions, leading to generic versions.

Warnings and Precautions (5.8)] Counseling Patients About Sexually Transmitted Diseases [see Warnings and Precautions (5.9)] The most common adverse reactions reported in clinical trials

Khía cạnh đạo đức

There is a potential for cardiac risk of sexual activity in patients with preexisting cardiovascular disease. Therefore, treatments for erectile dysfunction, including VIAGRA, should not be generally used in men for whom sexual activity is inadvisable because of their underlying cardiovascular status. The evaluation of erectile dysfunction should include a determination of potential underlying causes and the identification of appropriate treatment following a complete medical assessment. VIAGRA has systemic vasodilatory properties that resulted in transient decreases in supine blood pressure in healthy volunteers (mean maximum decrease of 8.4/5.5 mmHg), [see Clinical Pharmacology (12.2)]. While this normally would be expected to be of little consequence in most patients, prior to prescribing VIAGRA, physicians should carefully consider whether their patients with underlying cardiovascular disease could be affected adversely by such vasodilatory effects, especially in combination with sexual activity.

What is Viagra’s form?

Use with caution in patients with the following underlying conditions which can be particularly sensitive to the actions of vasodilators including VIAGRA – those with left ventricular outflow obstruction (e.g., aortic stenosis, idiopathic hypertrophic subaortic stenosis) and those with severely impaired autonomic control of blood pressure. There are no controlled clinical data on the safety or efficacy of VIAGRA in the following groups; if prescribed, this should be done with caution. Patients who have suffered a myocardial infarction, stroke, or life-threatening arrhythmia within the last 6 months; Patients with resting hypotension (BP <90/50 mmHg) or hypertension (BP >170/110 mmHg); Patients with cardiac failure or coronary artery disease causing unstable angina. Prolonged erection greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported infrequently since market approval of VIAGRA. In the event of an erection that persists longer than 4 hours, the patient should seek immediate medical assistance. (≥ 2%) are headache, flushing, dyspepsia, abnormal vision,

Further information

If priapism is not treated immediately, penile tissue damage and permanent loss of potency could result. VIAGRA should be used with caution in patients with anatomical deformation of the penis (such as angulation, cavernosal fibrosis or Peyronie's disease), or in patients who have conditions which may predispose them to priapism (such as sickle cell anemia, multiple myeloma, or leukemia). However, there are no controlled clinical data on the safety or efficacy of VIAGRA in patients with sickle cell or related anemias. Physicians should advise patients to stop use of all phosphodiesterase type 5 (PDE5) inhibitors, including VIAGRA, and seek medical attention in the event of a sudden loss of vision in one or both eyes. Such an event may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION), a rare condition and a cause of decreased vision including permanent loss of vision, that has been reported rarely post-marketing in temporal association with the use of all PDE5 inhibitors.

Dosage and Administration

Based on published literature, the annual incidence of NAION is 2.5–11.8 cases per 100,000 in males aged ≥ 50. An observational case-crossover study evaluated the risk of NAION when PDE5 inhibitor use, as a class, occurred immediately before NAION onset (within 5 half-lives), compared to PDE5 inhibitor use in a prior time period. The results suggest an approximate 2-fold increase in the risk of NAION, with a risk estimate of 2.15 (95% CI 1.06, 4.34). A similar study reported a consistent result, with a risk estimate of 2.27 (95% CI 0.99, 5.20). Other risk factors for NAION, such as the presence of "crowded" optic disc, may have contributed to the occurrence of NAION in these studies. nasal congestion, back pain, myalgia, nausea, dizziness, and rash.

How should I take Viagra?

In humans, VIAGRA has no effect on bleeding time when taken alone or with aspirin. However, in vitro studies with human platelets indicate that sildenafil potentiates the antiaggregatory effect of sodium nitroprusside (a nitric oxide donor). In addition, the combination of heparin and VIAGRA had an additive effect on bleeding time in the anesthetized rabbit, but this interaction has not been studied in humans. The safety of VIAGRA is unknown in patients with bleeding disorders and patients with active peptic ulceration. The use of VIAGRA offers no protection against sexually transmitted diseases.