4 CONTRAINDICATIONS

VIAGRA was administered to over 3700 patients (aged 19-87 years) during premarketing clinical trials worldwide. In placebo-controlled clinical studies, the discontinuation rate due to adverse reactions for VIAGRA (2.5%) was not significantly different from placebo (2.3%).

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To save, just show your prescription discount card at checkout. Alternatively, you can compare prices on SingleCare.com or by using the SingleCare app. Simply inform your healthcare provider where to send your prescription, and then download the coupon for your preferred pharmacy to present at checkout. Get your free SingleCare prescription discount card You may be able to save on Sildenafil by purchasing a 90-tablet supply instead of a 30-tablet supply. With a SingleCare coupon for Sildenafil, you could pay $0.53 per pill with a 30-tablet prescription or $0.33 per pill with a 90-tablet prescription.

Viagra and herbs and supplements

For pulmonary hypertension, it’s worth considering purchasing a health insurance policy. Pulmonary hypertension is a chronic and serious condition, so the expenses will add up. Costs do not only include medications, but also office visits, tests, and procedures. Visit your state’s Health Insurance Marketplace to find the most affordable policies, or contact a local agent to help you find plans that cover sildenafil. Additionally, if there are other chronic health problems present, having health insurance coverage may be the best overall way to save money. Adverse Reactions Reported by ≥2% of Patients Treated with VIAGRA and More Frequent than Placebo in Fixed-Dose Phase II/III Studies * When VIAGRA was taken as recommended (on an as-needed basis) in flexible-dose, placebo-controlled clinical trials of two to twenty-six weeks duration, patients took VIAGRA at least once weekly, and the following adverse reactions were reported: Adverse Reactions Reported by ≥2% of Patients Treated with VIAGRA and More Frequent than Placebo in Flexible-Dose Phase II/III Studies * The following events occurred in <2% of patients in controlled clinical trials; a causal relationship to VIAGRA is uncertain.

Reported events include those with a plausible relation to drug use; omitted are minor events and reports too imprecise to be meaningful: Body as a Whole: face edema, photosensitivity reaction, shock, asthenia, pain, chills, accidental fall, abdominal pain, allergic reaction, chest pain, accidental injury.

• The prescribing dose may vary based on individual health factors.
• Side effects are usually mild and temporary.
• Seek emergency medical care if you experience chest pain.
• Sildenafil can cause low blood pressure in some users.
• Ensure your healthcare provider is aware of all medications.
• Sexually transmitted diseases increase risks when using sildenafil.
• Response time varies; some may feel effects sooner or later.
• The medication was revolutionary for erectile dysfunction treatment.
• Regular lifestyle changes can enhance the efficacy of sildenafil.

Respiratory: asthma, dyspnea, laryngitis, pharyngitis, sinusitis, bronchitis, sputum increased, cough increased.

8.5 Geriatric Use

The maximum recommended dosing frequency is once per day. Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg. VIAGRA may be taken with or without food. VIAGRA was shown to potentiate the hypotensive effects of nitrates and its administration in patients who use nitric oxide donors such as organic nitrates or organic nitrites in any form is therefore contraindicated [see CONTRAINDICATIONS, DRUG INTERACTIONS, and CLINICAL PHARMACOLOGY]. When VIAGRA is co-administered with an alpha-blocker, patients should be stable on Sections or subsections omitted from the full prescribing information are not listed.

What should I do if I accidentally use too much sildenafil?

alpha-blocker therapy prior to initiating VIAGRA treatment and VIAGRA should be initiated at 25 mg [see WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS, and CLINICAL PHARMACOLOGY]. The recommended dose for ritonavir-treated patients is 25 mg prior to sexual activity and the recommended maximum dose is 25 mg within a 48 hour period because concomitant administration increased the blood levels of sildenafil by 11-fold [see WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS, and CLINICAL PHARMACOLOGY]. Consider a starting dose of 25 mg in patients treated with strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, or saquinavir) or erythromycin. Clinical data have shown that co-administration with saquinavir or erythromycin increased plasma levels of sildenafil by about 3 fold [see DRUG INTERACTIONS and CLINICAL PHARMACOLOGY]. Consider a starting dose of 25 mg in patients > 65 years, patients with hepatic impairment (e.g., cirrhosis), and patients with severe renal impairment (creatinine clearance <30 mL/minute) because administration of VIAGRA in these patients resulted in higher plasma levels of sildenafil [see Use In Specific Populations and CLINICAL PHARMACOLOGY]. Skin and Appendages: urticaria, herpes simplex, pruritus, sweating, skin ulcer, contact dermatitis, exfoliative dermatitis.

Non-medical use

VIAGRA is supplied as blue, rounded diamond shaped film-coated tablets containing sildenafil citrate equivalent to 25 mg, 50 mg, or 100 mg of sildenafil. Tablets are debossed with “VIAGRA” on one side and “VGR 25”, “VGR 50” or “VGR 100” on the other to indicate the dosage strengths. VIAGRA (sildenafil citrate) is supplied as blue, rounded diamond shaped film-coated tablets containing sildenafil citrate equivalent to the nominally indicated amount of sildenafil and debossed on the obverse and reverse sides as follows: Store at 25°C (77°F); excursions permitted to 15-30°C (59- 86°F) [see USP Controlled Room Temperature]. Distributed by: Viatris Specialty LLC, Morgantown, WV 26505 U.S.A. Revised: Nov 2023 The following are discussed in more detail in other sections of the labeling: Prolonged Erection and Priapism [see WARNINGS AND PRECAUTIONS] Effects on the Eye [see WARNINGS AND PRECAUTIONS] Hypotension when Co-administered with Alpha-blockers or Anti-hypertensives [see WARNINGS AND PRECAUTIONS] Adverse Reactions with the Concomitant Use of Ritonavir [see WARNINGS AND PRECAUTIONS] Combination with other PDE5 Inhibitors or Other Erectile Dysfunction Therapies [see WARNINGS AND PRECAUTIONS] Effects on Bleeding [see WARNINGS AND PRECAUTIONS] Counseling Patients About Sexually Transmitted Diseases [see WARNINGS AND PRECAUTIONS] The most common adverse reactions reported in clinical trials (≥ 2%) are headache, flushing, dyspepsia, abnormal vision, nasal congestion, back pain, myalgia, nausea, dizziness, and rash. Analysis of the safety database from controlled clinical trials showed no apparent difference in adverse reactions in patients taking VIAGRA with and without antihypertensive medication.

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The SingleCare prices in this article are the most accurate at the time of publishing in ZIP code 23666 as of Jan. 20, 2026. Visit our sildenafil coupon page for updated sildenafil prices near you. Humana drug lists for providers, Humana (2025) Medically accurate: SingleCare’s Medical Review Board analyzes all of our content to confirm it’s in line with current medical advice. Evidence-based: Our content is sourced from reputable U.S.-based healthcare professionals and peer-reviewed research.

Is Viagra safe to use?

Trustworthy: All of SingleCare’s content goes through a multi-phase review process by our writers, editors, and Medical Board in order to provide clear and credible information. VIAGRA is formulated as blue, film-coated rounded-diamond-shaped tablets equivalent to 25 mg, 50 mg, and 100 mg of sildenafil for oral administration. VIAGRA is indicated for the treatment of erectile dysfunction. For most patients, the recommended dose is 50 mg taken, as needed, approximately sildenafil pick up 1 hour before sexual activity. However, VIAGRA may be taken anywhere from 30 minutes to 4 hours before sexual activity. The following adverse reactions have been identified during post approval use of VIAGRA.

These events have been chosen for inclusion either due to their seriousness, reporting frequency, lack of clear alternative causation, or a combination of these factors.

Serious cardiovascular, cerebrovascular, and vascular events, including myocardial infarction, sudden cardiac death, ventricular arrhythmia, cerebrovascular hemorrhage, transient ischemic attack, hypertension, subarachnoid and intracerebral hemorrhages, and pulmonary hemorrhage have been reported post-marketing in temporal association with the use of VIAGRA. Many of these events were reported to occur during or shortly after sexual activity, and a few were reported to occur shortly after the use of VIAGRA without sexual activity.

• Sildenafil 100 mg does not protect against sexually transmitted diseases.
• It is not recommended for women or children.
• The medication can sometimes cause back pain or muscle aches.
• Use sildenafil only as prescribed to minimize risks.
• Some users report facial flushing after taking the pill.
• Avoid excessive physical activity immediately after taking the drug.
• Always read the patient information leaflet before use.
• Do not share your medication with others.
• Sildenafil may cause nasal stuffiness or congestion.

Others were reported to have occurred hours to days after the use of VIAGRA and sexual activity.

• Sildenafil was originally developed to treat pulmonary hypertension.
• The 100 mg dosage is often prescribed when lower doses are ineffective.
• It can cause vision changes such as blurred vision or a blue tint.
• Alcohol consumption can enhance side effects and reduce effectiveness.
• Patients with heart conditions should consult a doctor before use.
• The medication is available by prescription only in many countries.
• Use with caution in patients with kidney or liver impairment.
• Report any allergic reactions like rash or difficulty breathing immediately.
• Sildenafil may cause dizziness; avoid operating heavy machinery after intake.

It is not possible to determine whether these events are related directly to VIAGRA, to sexual activity, to the patient’s underlying cardiovascular disease, to a combination of these factors, or to other factors [see WARNINGS AND PRECAUTIONS and PATIENT INFORMATION]. Hemic and Lymphatic: vaso-occlusive crisis: In a small, prematurely terminated study of REVATIO (sildenafil) in patients with pulmonary arterial hypertension (PAH) secondary to sickle cell disease, vaso-occlusive crises requiring hospitalization were more commonly reported in patients who received sildenafil than in those randomized to placebo. The clinical relevance of this finding to men treated with VIAGRA for ED is not known.

Nervous: seizure, seizure recurrence, anxiety, and transient global amnesia.

4.2 Hypersensitivity Reactions

Tadalafil is an alternative PDE5 inhibitor used for pulmonary hypertension and may be less expensive than sildenafil. Other lower-cost treatments, like calcium channel blockers, diuretics, and digoxin, may be options for some patients, but other pulmonary hypertension drugs are usually more expensive. Keep in mind that pulmonary hypertension is a serious medical condition, and some medications may not be suitable for individual cases. RELATED: How to choose the best ED pill These are the most accurate medication prices as of Jan. 20, 2026, for the ZIP code 23666.

What causes an erection?

The listed price without insurance references the price of brand-name drugs (unless otherwise specified). The listed SingleCare price references the price of generic drugs if available. Sildenafil can be costly without insurance, but there are ways to reduce the price. SingleCare’s lowest price for a 30-tablet supply of sildenafil is $16. Keep in mind that prices fluctuate and vary by pharmacy. Hearing: Cases of sudden decrease or loss of hearing have been reported postmarketing in temporal association with the use of PDE5 inhibitors, including VIAGRA.

• Sildenafil 100 mg is often part of a broader treatment plan.
• It’s important to follow your doctor’s instructions precisely.
• Overuse can lead to priapism, a painful and prolonged erection.
• It is not a cure for erectile dysfunction but helps manage symptoms.
• Do not take sildenafil if you are on medications containing nitroglycerin.
• Regular check-ups may be necessary to monitor health effects.
• The medication has been available since the late 1990s.
• Use caution when combining sildenafil with blood pressure medications.
• Seek immediate medical help if you experience vision loss.