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

Stendra is a medicine containing avanafil, used to treat erectile dysfunction (ED) in adult men. This guide explains what Stendra is, how it works, how to take it, what to expect, possible side effects, and important safety information. It is written for patients in Australia and uses clear, everyday language.

Key Product Information

How Stendra Works (Mechanism of Action)

Stendra belongs to the PDE5 inhibitor family. Sexual stimulation triggers the release of nitric oxide in the penis, which increases levels of cGMP. cGMP helps relax smooth muscle and increases blood flow, supporting an erection.

Avanafil helps by blocking PDE5—an enzyme that breaks down cGMP. When PDE5 is inhibited, cGMP lasts longer, improving the body’s natural erectile response when you are sexually stimulated.

• Not an aphrodisiac: it does not increase sexual desire.
• Supports natural response: erections are improved in response to arousal.
• Helps blood flow: improved blood flow to achieve and maintain an erection.

Pharmacokinetics (Absorption, Onset, Duration)

“Pharmacokinetics” describes how the body processes a medicine: absorption into the bloodstream, peak levels, and how long effects last. Individual results vary with age, health, liver function, and other medicines.

• Absorption: Avanafil is absorbed after oral administration.
• Time to peak concentration: levels typically peak within a few hours (exact timing varies).
• Onset of effect: many men can notice effects as early as about 15–30 minutes.
• Duration: effects may last long enough for sexual activity, often up to several hours; responsiveness varies by person.
• Metabolism: primarily metabolised by the liver (notably via CYP3A4).
• Elimination: drug and metabolites are cleared mainly via the body’s normal pathways.

Typical Use and What to Expect

Stendra is used for erectile dysfunction (ED). It helps you get an erection that is firm enough for sex and helps maintain that erection once you begin sexual activity.

It is taken before planned sexual activity. You should use Stendra only when you intend to have sex, not continuously throughout the day.

• Works best with sexual stimulation.
• Plan ahead for timing (see “Timing” section below).
• Keep expectations realistic: ED may have multiple causes, and response can vary.

Indications (What Stendra is Used For)

Stendra (avanafil) is indicated for the treatment of erectile dysfunction in adult men. It is intended to improve erectile function during sexual activity.

Dosing (General Guidance)

Dosing depends on your age, overall health, and whether you take interacting medicines. Follow the dosing instructions provided by your healthcare professional.

In general practice, the typical approach is:

• Starting dose: often 100 mg on demand (individual selection may vary).
• Adjustments: dose may be increased or decreased depending on effectiveness and tolerability.
• Maximum frequency: commonly limited to one dose per day.

Important: If you take medicines that strongly interact with avanafil (particularly certain antifungals or antibiotics, or some HIV medicines), your dose and timing may need to be changed to reduce the risk of side effects.

Timing: When to Take Stendra

Stendra is taken as an oral dose before sexual activity. Timing affects how quickly it works and how well it works.

• For many men, a suitable timing is about 15–30 minutes before sexual activity.
• Some men may need closer to 30–60 minutes; individual response varies.
• Take it only when you plan to have sex.

If you are unsure about the best timing for you, consider:

• How quickly you typically respond to PDE5 inhibitors.
• Whether you usually eat before sex (see food interactions below).
• Any medicines that affect drug levels in your body.

Food Interactions (Including High-Fat Meals)

Food can change how quickly Stendra is absorbed. This can delay onset and make it harder to predict when it will work.

• High-fat meals may reduce and delay the onset of avanafil.
• If you plan to take Stendra, consider taking it when your stomach is not heavily loaded with a high-fat meal.
• If you usually eat a heavy meal, you may need to allow extra time before sex.

Practical tip: If you want the most predictable timing, choose a lighter meal or wait longer after eating before taking Stendra.

Alcohol and Stendra Interactions

Alcohol does not usually “cancel” Stendra directly, but it can make ED worse and can affect your blood pressure. Excess alcohol can also reduce sexual performance and increase the risk of dizziness or faintness.

• Moderate drinking is generally less likely to cause problems than heavy drinking.
• Avoid excessive alcohol if you notice light-headedness or you have cardiovascular risk factors.
• If you take Stendra and you feel dizzy, unsteady, or faint, stop activity and seek medical advice.

Medicine Interactions (Very Important)

Drug interactions can raise or lower avanafil levels or increase side effects. Some combinations may be unsafe. Always check interactions with a pharmacist or healthcare professional, especially if you use regular medications.

1) Nitrates and “poppers” (Absolute Avoidance)

Do not use Stendra with nitrates (for example, glyceryl trinitrate/nitroglycerin, isosorbide products) or with products containing nitric oxide donors used for chest pain. This combination can cause a dangerous drop in blood pressure.

Avoid also recreational inhaled nitrates (commonly called “poppers”), as they can contain nitrate-like substances.

2) Riociguat (Absolute Avoidance)

Do not combine avanafil with riociguat, a medicine used for certain types of pulmonary hypertension. The combination can lead to unsafe blood pressure effects.

3) Strong CYP3A4 inhibitors (Dose adjustment and extra caution)

Avanafil is metabolised partly by CYP3A4. Medicines that strongly inhibit CYP3A4 can increase avanafil levels and side effects (such as headache, flushing, dizziness, or low blood pressure).

Examples of medicines that may require caution (not exhaustive):

• Certain antifungal medicines (for example, ketoconazole, itraconazole)
• Certain antibiotics (for example, clarithromycin)
• Some HIV medicines (antiretroviral protease inhibitors)

4) Alpha-blockers for prostate symptoms or blood pressure

Combining PDE5 inhibitors with alpha-blockers may increase dizziness or low blood pressure in some people. Your clinician may recommend starting at a lower dose and careful timing.

5) Other ED medicines

Do not use Stendra at the same time as another PDE5 inhibitor (such as sildenafil or tadalafil). Using multiple ED medicines together increases the chance of side effects without improving safety.

Safety Profile: Common and Serious Side Effects

Like all medicines, Stendra can cause side effects. Many are mild and short-lived, but seek medical advice if you have concerning symptoms.

Common side effects

• Headache
• Flushing
• Stuffy or blocked nose (nasal congestion)
• Back pain or muscle aches (less common but may occur)
• Dizziness
• Indigestion or mild stomach discomfort

Serious but less common risks

• Vision changes (seek urgent medical care)
• Sudden hearing changes (seek urgent medical care)
• Chest pain or symptoms suggesting heart trouble (seek urgent medical care)
• Fainting or severe dizziness due to low blood pressure
• Priapism (an erection lasting more than 4 hours)—this is a medical emergency

If you experience severe side effects, stop sexual activity and seek urgent medical help.

Practical Use Tips (Maximise Effectiveness and Comfort)

• Take it at the right time: aim for ~15–30 minutes before sex, adjusting based on how your body responds.
• Avoid a heavy high-fat meal right beforehand to improve predictability.
• Use sexual stimulation: Stendra works with arousal; it does not create desire.
• Consider stress, fatigue, and alcohol: these can strongly influence ED.
• Don’t “double up”: if it doesn’t work the first time, discuss adjustment rather than increasing without guidance.
• Be consistent with timing: if you want to test effectiveness, keep meal timing similar across attempts.
• Know what “works for you”: some men respond better at different doses or times.

If you have diabetes, high blood pressure, high cholesterol, or cardiovascular disease, managing these conditions can improve ED long-term.

When to Be Cautious or Seek Advice

Certain situations may require extra caution before taking avanafil. Discuss with a healthcare professional if you:

• Have a history of heart disease, stroke, or significant cardiovascular risk
• Have very low or very high blood pressure
• Have severe liver impairment or severe kidney impairment
• Have a condition that affects erections (for example, Peyronie’s disease)
• Have a history of priapism
• Use medications known to interact with PDE5 inhibitors

Also, be cautious if you’ve been told to avoid sexual activity due to heart conditions.

Alternative Options for Erectile Dysfunction

If Stendra isn’t suitable or doesn’t work well for you, several alternatives exist. Your clinician can help choose based on your health profile and preferences.

Other PDE5 inhibitors

• Sildenafil (short-to-moderate duration; timing varies)
• Tadalafil (longer duration for some men; different dosing options may apply)
• Vardenafil (another PDE5 inhibitor)

Non-PDE5 approaches

• Vacuum erection devices (mechanical assistance)
• Penile injections (usually for selected cases)
• Urethral therapy (where available)
• Psychosexual counselling for performance anxiety or relationship factors

Lifestyle and health measures

• Stopping smoking
• Improving physical fitness and weight
• Better control of blood pressure, cholesterol, and blood sugar
• Reducing alcohol intake
• Addressing sleep apnoea and stress

Market and Legal Context (Australia)

In Australia, ED treatments may have specific prescribing and pharmacy supply requirements. Availability can vary by product and location, and medicines are regulated to ensure quality, safety, and appropriate use.

Online pharmacies typically provide medicines in line with Australian laws and supply standards, including handling, storage, and verification processes. Patient counselling and screening for contraindications and interacting medicines are important for safe use.

If you are buying medication online, choose a reputable Australian-registered pharmacy and ensure product legitimacy. Avoid counterfeit products and unverified sellers.

Recent Guidance and Updates (General)

Healthcare recommendations can evolve as new safety information and evidence become available. In general, ongoing emphasis includes:

• Careful screening for cardiovascular safety and interacting medicines
• Clear patient instructions on timing and not combining with nitrates
• Attention to rare serious events like priapism and vision/hearing changes
• Appropriate dose selection based on tolerability and interacting drugs

If you have concerns or questions, consult a healthcare professional or pharmacist for the most current advice relevant to you.

Delivery and Availability

Availability of Stendra may vary depending on supply, packaging, and pharmacy stock. Many online pharmacies in Australia arrange delivery to eligible locations.

• Packaging: tablets are typically supplied in sealed containers to protect quality.
• Storage: store at room temperature and keep away from moisture and heat (follow label instructions).
• Delivery times: depend on the pharmacy provider and your address.
• Tracking: some services provide tracking details once dispatched.

For the latest information on stock, delivery areas, and estimated dispatch timelines, check the product page on your chosen online pharmacy.

Frequently Asked Questions (FAQ)

1) Is Stendra the same as Viagra?

Stendra and Viagra are different medicines. Stendra contains avanafil, while Viagra contains sildenafil. Both are PDE5 inhibitors and work in a similar way, but their onset, duration, and interactions may differ.

2) How quickly does Stendra work?

Many men notice effects within about 15–30 minutes after taking it, though timing varies. Food—especially a high-fat meal—can delay onset.

3) Can I take Stendra every day?

Stendra is typically taken as needed before sexual activity rather than continuously. Your clinician’s dosing instructions (including maximum frequency) should guide you.

4) What if Stendra doesn’t work for me?

Several factors can affect response: incorrect timing, heavy meals, stress, alcohol, smoking, and interacting medicines. If it doesn’t work, it’s best to review your approach with a healthcare professional rather than increasing dose on your own.

5) Can I drink alcohol with Stendra?

Moderate alcohol is usually less problematic than heavy drinking, but excess alcohol can worsen ED and increase dizziness or blood pressure effects. Avoid heavy drinking and seek advice if you feel unwell.

6) What medicines should I avoid with Stendra?

In particular, avoid nitrates and riociguat. Also be cautious with medications that inhibit CYP3A4 or those used for prostate symptoms (alpha-blockers). A pharmacist can check your list of medicines for interactions.

7) What should I do if I get side effects?

If side effects are mild (such as headache or flushing), they often improve as the medication effect wears off. If you experience severe dizziness, chest pain, fainting, or symptoms such as vision or hearing changes, seek urgent medical care.

8) What is priapism and what do I do?

Priapism is an erection lasting more than 4 hours. This requires emergency medical treatment to prevent damage. If it occurs, seek urgent help immediately.

9) Can I take Stendra with other ED treatments?

Do not combine Stendra with another PDE5 inhibitor. Combining ED medicines can increase side effects and risks. Other non-PDE5 options may exist depending on your situation.

10) Are there lifestyle changes that improve ED?

Yes. Managing cardiovascular health, exercising regularly, reducing alcohol, stopping smoking, and addressing sleep and stress can improve ED—sometimes improving response to PDE5 inhibitors.

Summary

Stendra (avanafil) is an on-demand PDE5 inhibitor used to treat erectile dysfunction. It works by enhancing the body’s natural blood-flow response during sexual stimulation. For many men, it may begin working within 15–30 minutes, with timing influenced by food, especially high-fat meals.

For safety and effectiveness, pay close attention to interacting medicines, avoid nitrates and riociguat, limit heavy alcohol, and follow dosing guidance provided by healthcare professionals.