HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use STENDRA safely and effectively. See full prescribing information for STENDRA.
STENDRA™ (avanafil) tablets, for oral use
Initial U.S. Approval: 2012
INDICATIONS AND USAGE
STENDRA is a phosphodiesterase 5 (PDE5) inhibitor indicated for the treatment of erectile dysfunction (1)
DOSAGE AND ADMINISTRATION
■For most patients, the starting dose is 100 mg taken approximately 30 minutes before sexual activity, on an as needed basis (2.1)
■Take STENDRA no more than once a day (2.1).
■The dose may be increased to 200 mg or decreased to 50 mg based on efficacy and/or tolerability. Use the lowest dose that provides benefit (2.1)
■STENDRA may be taken with or without food (2.2)
■Do not use STENDRA with strong CYP3A4 inhibitors (2.3)
■If taking a moderate CYP3A4 inhibitor, the dose should be no more than 50 mg in a 24-hour period (2.3).
■In patients on stable alpha-blocker therapy, the recommended starting dose of STENDRA is 50 mg (2.3).
DOSAGE FORMS AND STRENGTHS
Tablets: 50 mg, 100 mg, 200 mg (3)
CONTRAINDICATIONS
■Administration of STENDRA to patients using any form of organic nitrate is contraindicated (4.1)
■Hypersensitivity to any component of the STENDRA tablet (4.2)
WARNINGS AND PRECAUTIONS
■Patients should not use STENDRA if sexual activity is inadvisable due to cardiovascular status or any other reason (5.1)
■Use of STENDRA with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension (2.3, 5.6, 5.7)
■Patients should seek emergency treatment if an erection lasts greater than 4 hours (5.3)
■Patients should stop STENDRA and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of Non Arteritic Ischemic Optic Neuropathy (NAION). Discuss with patients the increased risk of NAION in patients with a history of NAION (5.4)
■Patients should stop taking STENDRA and seek prompt medical attention in the event of sudden decrease or loss of hearing (5.5)
ADVERSE REACTIONS
Most common adverse reactions (greater than or equal to 2%) include headache, flushing, nasal congestion, nasopharyngitis, and back pain (6.1)
To report SUSPECTED ADVERSE REACTIONS, contact VIVUS at (1-866-330-1871) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
DRUG INTERACTIONS
■STENDRA can potentiate the hypotensive effect of nitrates, alpha-blockers, antihypertensives, and alcohol (7.1)
■CYP3A4 inhibitors (e.g., ketoconazole, ritonavir, erythromycin) increase STENDRA exposure (7.2)
USE IN SPECIFIC POPULATIONS
■Do not use in patients with severe renal impairment (8.6)
■Do not use in patients with severe hepatic impairment (8.7)
See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling.
Revised: 04/2013
FULL PRESCRIBING INFORMATION: CONTENTS *
1 INDICATIONS AND USAGE
2 DOSAGE AND ADMINISTRATION
2.1 Erectile Dysfunction
2.2 Use with Food
2.3 Concomitant Medications
3 DOSAGE FORMS AND STRENGTHS
4 CONTRAINDICATIONS
4.1 Nitrates
4.2 Hypersensitivity Reactions
5 WARNINGS AND PRECAUTIONS
5.1 Cardiovascular Risks
5.2 Concomitant Use of CYP3A4 Inhibitors
5.3 Prolonged Erection
5.4 Effects on Eye
5.5 Sudden Hearing Loss
5.6 Alpha-Blockers and Other Antihypertensives
5.7 Alcohol
5.8 Combination with Other PDE5 Inhibitors or Erectile Dysfunction Therapies
5.9 Effects on Bleeding
5.10 Counseling Patients about Sexually Transmitted Diseases
6 ADVERSE REACTIONS
6.1 Clinical Trials Experience
7 DRUG INTERACTIONS
7.1 Potential for Pharmacodynamic Interactions with STENDRA
7.2 Potential for Other Drugs to Affect STENDRA
7.3 Potential for STENDRA to Affect Other Drugs
8 USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
8.4 Pediatric Use
8.5 Geriatric Use
8.6 Renal Impairment
8.7 Hepatic Impairment
10 OVERDOSAGE
11 DESCRIPTION
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
12.2 Pharmacodynamics
12.3 Pharmacokinetics
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis and Impairment of Fertility
13.2 Animal Toxicology and/or Pharmacology
14 CLINICAL STUDIES
16 HOW SUPPLIED/STORAGE AND HANDLING
17 PATIENT COUNSELING INFORMATION
17.1 Nitrates
17.2 Cardiovascular Considerations
17.3 Concomitant Use with Drugs Which Lower Blood Pressure
17.4 Potential for Drug Interactions
17.5 Priapism
17.6 Vision
17.7 Sudden Hearing Loss
17.8 Alcohol
17.9 Sexually Transmitted Disease
17.10 Recommended Administration
*
Sections or subsections omitted from the full prescribing information are not listed.
FULL PRESCRIBING INFORMATION
1 INDICATIONS AND USAGE
STENDRA is a phosphodiesterase 5 (PDE5) inhibitor indicated for the treatment of erectile dysfunction.
2 DOSAGE AND ADMINISTRATION
2.1 Erectile Dysfunction
The recommended starting dose is 100 mg. STENDRA should be taken orally as needed approximately 30 minutes before sexual activity. Based on individual efficacy and tolerability, the dose may be increased to a maximum dose of 200 mg or decreased to 50 mg. The lowest dose that provides benefit should be used. The maximum recommended dosing frequency is once per day. Sexual stimulation is required for a response to treatment.
2.2 Use with Food
STENDRA may be taken with or without food.
2.3 Concomitant Medications
CYP3A4 Inhibitors
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For patients taking concomitant strong CYP3A4 inhibitors (including ketoconazole, ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir and telithromycin), do not use STENDRA [see Warnings and Precautions (5.2) and Drug Interactions (7.2)].
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For patients taking concomitant moderate CYP3A4 inhibitors (including erythromycin, amprenavir, aprepitant, diltiazem, fluconazole, fosamprenavir, and verapamil), the maximum recommended dose of STENDRA is 50 mg, not to exceed once every 24 hours [see Warnings and Precautions (5.2) and Drug Interactions (7.2)].
3 DOSAGE FORMS AND STRENGTHS
STENDRA (avanafil) is supplied as oval, pale yellow tablets containing 50 mg, 100 mg, or 200 mg avanafil debossed with dosage strength
4 CONTRAINDICATIONS
4.1 Nitrates
Administration of STENDRA with any form of organic nitrates, either regularly and/or intermittently, is contraindicated. Consistent with its known effects on the nitric oxide/cyclic guanosine monophosphate (cGMP) pathway, STENDRA has been shown to potentiate the hypotensive effects of nitrates.
In a patient who has taken STENDRA, where nitrate administration is deemed medically necessary in a life-threatening situation, at least 12 hours should elapse after the last dose of STENDRA before nitrate administration is considered. In such circumstances, nitrates should only be administered under close medical supervision with appropriate hemodynamic monitoring [see Contraindications (4.1), Dosage and Administration (2.3), and Clinical Pharmacology (12.2)].
4.2 Hypersensitivity Reactions
STENDRA is contraindicated in patients with a known hypersensitivity to any component of the tablet. Hypersensitivity reactions have been reported, including pruritis and eyelid swelling.
5 WARNINGS AND PRECAUTIONS
eva luation of erectile dysfunction (ED) should include an appropriate medical assessment to identify potential underlying causes, as well as treatment options.
Before prescribing STENDRA, it is important to note the following:
5.1 Cardiovascular Risks
There is a potential for cardiac risk during sexual activity in patients with pre-existing cardiovascular disease. Therefore, treatments for ED, including STENDRA, should not be used in men for whom sexual activity is inadvisable because of their underlying cardiovascular status.
Patients with left ventricular outflow obstruction (e.g., aortic stenosis, idiopathic hypertrophic subaortic stenosis) and those with severely impaired autonomic control of blood pressure can be particularly sensitive to the actions of vasodilators, including STENDRA.
The following groups of patients were not included in clinical safety and efficacy trials for STENDRA, and therefore until further information is available, STENDRA is not recommended for the following groups:
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Patients who have suffered a myocardial infarction, stroke, life-threatening arrhythmia, or coronary revascularization within the last 6 months;
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Patients with resting hypotension (blood pressure less than 90/50 mmHg) or hypertension (blood pressure greater than 170/100 mmHg);
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Patients with unstable angina, angina with sexual intercourse, or New York Heart Association Class 2 or greater congestive heart failure.
As with other PDE5 inhibitors STENDRA has systemic vasodilatory properties and may augment the blood pressure-lowering effect of other anti-hypertensive medications. STENDRA 200 mg resulted in transient decreases in sitting blood pressure in healthy volunteers of 8.0 mmHg systolic and 3.3 mmHg diastolic [see Clinical Pharmacology (12.2)], with the maximum decrease observed at 1 hour after dosing. While this normally would be expected to be of little consequence in most patients, prior to prescribing STENDRA, physicians should carefully consider whether patients with underlying cardiovascular disease could be affected adversely by such vasodilatory effects, especially in combination with sexual activity.
5.2 Concomitant Use of CYP3A4 Inhibitors
STENDRA metabolism is principally mediated by the CYP 450 isoform 3A4 (CYP 3A4). Inhibitors of CYP 3A4 may reduce STENDRA clearance and increase plasma concentrations of avanafil.
For patients taking concomitant strong CYP3A4 inhibitors (including ketoconazole, ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir and telithromycin), do not use STENDRA [see Drug Interactions (7.2)].
For patients taking concomitant moderate CYP3A4 inhibitors (including erythromycin, amprenavir, aprepitant, diltiazem, fluconazole, fosamprenavir, and verapamil), the maximum recommended dose of STENDRA is 50 mg, not to exceed once every 24 hours [see Drug Interactions (7.2)].
5.3 Prolonged Erection
Prolonged erection greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported with other PDE5 inhibitors. In the event of an erection that persists longer than 4 hours, the patient should seek immediate medical assistance. If not treated immediately, penile tissue damage and permanent loss of potency could result.
STENDRA 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).
5.4 Effects on Eye
Physicians should advise patients to stop use of all PDE5 inhibitors, including STENDRA 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 cause of decreased vision including permanent loss of vision that has been reported rarely postmarketing in temporal association with the use of all PDE5 inhibitors. It is not possible to determine whether these events are related directly to the use of PDE5 inhibitors or to other factors. Physicians should also discuss with patients the increased risk of NAION in individuals who have already experienced NAION in one eye, including whether such individuals could be adversely affected by use of vasodilators, such as PDE5 inhibitors [see Adverse Reactions (6)].
Patients with known hereditary degenerative retinal disorders, including retintis pigmentosa, were not included in the clinical trials of STENDRA, and use in these patients is not recommended.
5.5 Sudden Hearing Loss
Use of PDE5 inhibitors has been associated with sudden decrease or loss of hearing, which may be accompanied by tinnitus or dizziness. 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)]. Patients experiencing these symptoms should be advised to stop taking STENDRA and seek prompt medical attention.
5.6 Alpha-Blockers and Other Antihypertensives
Physicians should discuss with patients the potential for STENDRA to augment the blood pressure-lowering effect of alpha-blockers and other antihypertensive medications [see Drug Interactions (7.1) and Clinical Pharmacology (12.2)].
Caution is advised when PDE5 inhibitors are co-administered with alpha-blockers. Phosphodiesterase type 5 inhibitors, including STENDRA, 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 be anticipated. In some patients, concomitant use of these two drug classes can lower blood pressure significantly leading to symptomatic hypotension (e.g., dizziness, lightheadedness, fainting).
Consideration should be given to the following:
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Patients should be stable on alpha-blocker therapy prior to initiating treatment with a PDE5 inhibitor. Patients who demonstrate hemodynamic instability on alpha-blocker therapy alone are at increased risk of symptomatic hypotension with concomitant use of PDE5 inhibitors.
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In those patients who are stable on alpha-blocker therapy, PDE5 inhibitors should be initiated at the lowest dose (STENDRA 50 mg).
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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 [see Dosage and Administration (2) and Drug Interactions (7.1)].
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