Stendra (Avanafil) – Patient-Friendly Guide (Australia)

Stendra is a medicine used to treat erectile dysfunction (ED) in adult men. It contains avanafil, a medicine from the group known as phosphodiesterase type 5 (PDE5) inhibitors.

This guide explains how Stendra works, how to use it, typical timing, food and alcohol considerations, medicine interactions, safety information, and what to consider in Australia. Always follow the advice of a healthcare professional.

Basic product information

How Stendra works (mechanism of action)

Erections depend on blood flow to the penis and the ability of smooth muscle in penile tissue to relax. During sexual stimulation, the body releases signals that increase nitric oxide levels. This triggers an enzyme pathway that increases cyclic GMP, leading to relaxation of blood vessels and improved blood flow.

Avanafil inhibits PDE5, an enzyme that breaks down cyclic GMP. By slowing this breakdown, Stendra helps maintain cyclic GMP levels, supporting better blood flow during sexual arousal.

Key point: Stendra helps erections only when you are sexually stimulated. It does not create sexual desire by itself.

Pharmacokinetics (how the body handles avanafil)

Pharmacokinetics describes absorption, distribution, metabolism, and excretion—how the medicine moves through the body.

• Absorption: Avanafil is absorbed after oral dosing. Peak blood levels generally occur within a few hours.
• Onset: Clinical effects can begin relatively quickly, often within about 15–30 minutes in many men.
• Food effects: Food—especially a heavy or high-fat meal—can delay absorption and reduce how quickly it works.
• Metabolism: Avanafil is mainly metabolised in the liver (notably via CYP enzymes).
• Elimination: The medicine and its metabolites are cleared from the body mainly via the urine and faeces.

Individual responses vary, including due to age, underlying health conditions (such as diabetes or cardiovascular disease), and the presence of interacting medicines.

What Stendra is used for (indications)

Stendra is indicated for the treatment of erectile dysfunction in adult men.

• Erectile dysfunction (ED): Difficulty achieving and/or maintaining an erection sufficient for satisfactory sexual activity.

Stendra is not intended for use by women or children.

Typical dosing and how to take Stendra

Dosing can depend on your overall health, age, and medicines you take. Use the dose advised by your healthcare professional. Typical dosing is described below for general information.

Common starting approach

• Many men start at a lower dose (often 100 mg) to assess response and tolerability.
• Depending on effectiveness and side effects, clinicians may adjust dose (for example, 50 mg to 200 mg).

As-needed use

• Stendra is taken before sexual activity, on an as-needed basis.
• It is generally taken only once per day.

Timing (when to take it)

• For many men, take it about 15–30 minutes before sex.
• Some men may need closer to 30–60 minutes for best results, especially if food has delayed absorption.

Practical tip: If it’s not working as expected, don’t automatically increase the dose on the next attempt—discuss timing, food effects, and health factors with a clinician.

Food interactions (and what to eat)

Food can affect how quickly Stendra works. A large, high-fat meal may delay onset and reduce the speed of effect.

• Best approach: Consider taking Stendra on a relatively lighter stomach (or at least avoid a heavy meal right before).
• If you have a meal: Allow enough time for digestion; the “best timing” may shift later.
• Hydration: Staying hydrated can help you feel more comfortable, although it won’t “replace” correct dosing.

Alcohol and food together can also affect sexual performance indirectly through blood pressure and general wellbeing—see sections below.

Alcohol and medicine interactions

Alcohol

Moderate alcohol may not always cause problems, but excessive alcohol can worsen ED and increase side effects such as dizziness or faintness.

• Limit alcohol if possible, especially before trying Stendra.
• If you feel light-headed, sit or lie down and avoid further alcohol.

Important medicine interactions

Some medicines can significantly change avanafil levels or increase the risk of side effects. Below are the most important interaction categories.

• Nitrates (and nitrate-like medicines): Examples include glyceryl trinitrate and isosorbide products. The combination can cause dangerously low blood pressure.
• “Nitric oxide donors”: Certain substances used for angina can also interact.
• Riociguat: Often used for pulmonary arterial hypertension. Combination can lower blood pressure.
• Strong CYP3A4 inhibitors: Medicines that increase avanafil levels (e.g., some antifungals and certain HIV medicines) may raise the risk of adverse effects and may require a dose adjustment.
• Alpha-blockers: Used for prostate symptoms or high blood pressure. The combination can lower blood pressure; timing and stability of doses matter.
• Other ED medicines (PDE5 inhibitors): Taking more than one PDE5 inhibitor together is not recommended due to increased risk.

This is not a complete list. Tell your pharmacist or clinician about all medicines you take, including over-the-counter products and herbal supplements (particularly those affecting liver enzymes or blood pressure).

Safety profile and when to avoid Stendra

Most men tolerate Stendra well, but like all medicines it can cause side effects. The most important safety consideration is blood pressure effects and interactions with nitrates and certain cardiovascular medicines.

Common side effects

• Headache
• Flushing (warmth/redness)
• Indigestion or nausea
• Dizziness
• Nasal congestion
• Back pain (reported by some men)

Serious side effects – seek urgent medical care

• Chest pain or severe shortness of breath
• Fainting, severe dizziness, or symptoms suggesting dangerously low blood pressure
• Sudden vision loss in one or both eyes or sudden hearing loss
• Prolonged erection (erection lasting more than a few hours) — this requires urgent evaluation

When Stendra may not be suitable

Stendra may not be appropriate if you have certain medical conditions or if you take certain medicines. Extra caution is needed if you have:

• Heart conditions where sexual activity may be unsafe
• Low blood pressure or significant blood pressure instability
• Recent stroke or heart attack (timing depends on your clinician’s advice)
• Severe liver impairment or severe kidney impairment (dose adjustments may be required)
• Taking nitrates or riociguat (avoid combination due to blood pressure risk)

If you’re unsure, discuss your medical history before using Stendra.

Practical use tips for best results

• Plan timing: Take Stendra about 15–30 minutes before sexual activity (adjust if you’ve eaten a heavy meal).
• Stay sexually stimulated: Avanafil works best alongside normal sexual stimulation.
• Don’t “chase” with extra doses: If it doesn’t work, avoid taking more than the recommended daily limit.
• Consider lifestyle factors: ED can be affected by smoking, weight, exercise, stress, and cardiovascular health.
• Check your medication list: Interacting drugs (especially nitrates or certain enzyme inhibitors) can change safety and effectiveness.
• Start low if appropriate: A lower starting dose may reduce side effects while helping you find an effective regimen.

If you experience consistent insufficient response, it may be due to timing, meal effects, dose strength, or an interaction with another medicine. A healthcare professional can help identify the cause.

Alternative options for erectile dysfunction

If Stendra isn’t suitable or doesn’t work well for you, there are other evidence-based options. The best choice depends on your health, preferences, and medication interactions.

Other PDE5 inhibitors

• Sildenafil (often taken 30–60 minutes before sex; food may affect timing)
• Tadalafil (often longer acting; sometimes used with a daily regimen in selected patients)
• Vardenafil (similar class; timing varies by person)
• Other avanafil options (if available in your region)

Non-PDE5 approaches

• Vacuum erection devices
• Intra-penile therapies (used under medical guidance)
• Psychological and lifestyle interventions, especially if anxiety or relationship factors contribute
• Evaluating underlying causes such as diabetes, heart disease, thyroid problems, or medication side effects

Discuss alternatives with a healthcare professional, particularly if you have cardiovascular risk or take medicines that interact with PDE5 inhibitors.

Stendra in the Australian market: availability and legal context

In Australia, erectile dysfunction medicines are regulated as prescription medicines under the national medicines framework. Availability through pharmacies follows local compliance requirements and identification processes.

What this means for you:

• Choose reputable supply: Use authorised pharmacy channels.
• Accuracy matters: Ensure you receive the correct product strength and active ingredient.
• Consultation and safety checks: Legitimate suppliers typically ask about medical history and medications to reduce risks.
• Packaging and labelling: Should match Australian regulatory standards.

If you’re ordering online, check that the website clearly states pharmacy licensing and provides secure payment and delivery details.

Recent guidance and evolving advice (what to know)

Guidance around ED medicines continues to emphasise:

• Safety with cardiovascular disease: ED medicines may be unsuitable if heart risk makes sexual activity or blood pressure changes unsafe.
• Strict avoidance with nitrates: This remains a key safety message.
• Medication interaction awareness: Enzyme inhibitors and certain blood pressure medications can alter risk.
• Individualised dosing: Dose adjustments may be needed for liver/kidney impairment or interacting medications.
• Appropriate assessment: ED can be an early sign of vascular disease; clinicians may recommend evaluation if symptoms are new or worsening.

Because local recommendations can change, it’s wise to review advice from your healthcare provider and reliable Australian health sources when starting any ED medicine.

Delivery and availability (online pharmacy)

Availability may vary by supplier and by the strength you choose. Many online pharmacies can deliver across Australia, but delivery times depend on stock levels and your location.

• Packaging: Medicines should be shipped in protective packaging with clear labels.
• Delivery times: Often a few business days for metro areas, potentially longer for remote regions.
• Discreet service: Many reputable providers offer discreet packaging.
• Temperature considerations: Tablets generally store at controlled room temperature; follow storage instructions on the label.

Always confirm delivery eligibility and local requirements before placing an order.

FAQ (Frequently Asked Questions)

1) How quickly does Stendra (avanafil) work?

Many men notice effects within about 15–30 minutes. For some, especially after a heavy meal, it may take closer to 30–60 minutes. Sexual stimulation is still required.

2) How long does one dose last?

The effect can last for several hours, but the exact duration varies from person to person. Plan timing based on your experience and how you respond.

3) Can I take Stendra with food?

Yes, but a heavy or high-fat meal may delay onset. If you want it to work sooner, consider taking it with a lighter meal or on an emptier stomach (as advised by your healthcare professional).

4) Can I drink alcohol while using Stendra?

Light to moderate alcohol may be tolerated by some people, but excessive alcohol can worsen ED and may increase dizziness or flushing. If you drink, keep it moderate and pay attention to how you feel.

5) What medicines should I avoid?

Do not combine Stendra with nitrates (for angina) or riociguat. Also use extra caution with medicines that affect blood pressure and certain strong enzyme inhibitors. Tell your pharmacist about all medicines and supplements you take.

6) How often can I take it?

Follow your prescriber’s instructions. Typically, it should not be taken more than once in 24 hours.

7) What if it doesn’t work the first time?

ED response can depend on timing, meal effects, stress, smoking, and interacting medicines. Try one properly timed attempt, and if it still doesn’t work, speak to a healthcare professional before changing the dose.

8) Are there any warning signs I should not ignore?

Seek urgent medical care if you have chest pain, fainting, severe dizziness, sudden vision or hearing loss, or an erection lasting longer than a few hours.

9) Can Stendra be used for improving libido?

Stendra is for erections in men with ED. It does not act as an aphrodisiac and does not increase sexual desire.

10) Is Stendra safe for everyone?

No. Safety depends on your medical history and other medicines. People with certain cardiovascular conditions, low blood pressure, severe liver/kidney impairment, or nitrate use may not be suitable. A healthcare professional can advise.

Important: This information is general and not a substitute for personalised medical advice. If you have questions about whether Stendra is appropriate for you—or how it may interact with your current medicines—speak to a healthcare professional.