Erection problems can be difficult to talk about, but a medical consultation can help you understand the cause and explore treatment. Viagra is one option for erectile dysfunction (ED). Before taking it, it helps to know what the medicine can do, why a prescription matters and which side effects need urgent attention.
What Viagra Does and How Sildenafil Works
Viagra contains sildenafil, a medicine from a group called phosphodiesterase type 5 (PDE5) inhibitors. During sexual arousal, it helps blood vessels in the penis relax, supporting the increased blood flow needed to get and maintain an erection.
Sexual stimulation is still necessary. Taking a tablet does not automatically produce an erection, increase sexual desire or permanently resolve the underlying cause of ED.
Other sildenafil brands are also available in Australia. They contain the same active ingredient, although prices and inactive ingredients can vary. A pharmacist can explain the available options.
Do You Need a Prescription in Australia?
Yes. Viagra and sildenafil for ED are Schedule 4 prescription-only medicines in Australia. An authorised prescriber must assess whether treatment is appropriate before a pharmacy can dispense it against a valid prescription.
You can discuss erection difficulties with your GP or through an appropriate telehealth consultation. The assessment should cover your symptoms, medical history and current medicines. It may also involve checking for health conditions that could be contributing to ED.
An online appointment does not guarantee a prescription. The clinician may recommend further assessment, a different treatment or changes to an existing treatment plan.
How Quickly Does Viagra Start Working?
Sildenafil usually begins working within 30 to 60 minutes and is commonly taken about an hour before planned sexual activity. A heavy meal can delay its effect.
The opportunity to respond to sexual stimulation may last for up to four hours. This does not mean an erection should continue for that entire period.
Follow your prescribed dose and do not take more than one dose in 24 hours. Some people need a longer interval because of other medicines or health conditions. If the medicine does not work as expected, ask your prescriber for advice before changing the dose.
Which Medicines and Health Conditions Matter?
Sildenafil is unsuitable for some people and can interact with other treatments. Tell your doctor about every medicine, supplement and recreational substance you use.
- Nitrates and nitrites: Do not combine sildenafil with nitrate medicines for chest pain or nitrite drugs such as amyl nitrite, sometimes called poppers. The combination can cause a dangerous fall in blood pressure.
- Riociguat: This medicine must not be taken with sildenafil because of the risk of low blood pressure.
- Other medicines: Alpha-blockers, some antibiotics, antifungal medicines and certain HIV treatments can interact with sildenafil. Your doctor may need to adjust treatment.
- Medical history: Heart disease, a recent heart attack or stroke, blood pressure problems, liver or kidney disease and certain eye conditions require careful assessment.
Do not combine Viagra with other ED medicines. Avoid drinking large amounts of alcohol, which can make erection difficulties worse.
Possible Side Effects and When to Get Help
Common Side Effects
Possible common effects include headache, facial flushing, indigestion, dizziness and a blocked or runny nose. Speak with your doctor or pharmacist if symptoms persist, become troublesome or worry you.
Symptoms That Need Urgent Attention
Stop taking sildenafil and seek urgent medical help if you develop:
- An erection lasting four hours or longer, or a painful prolonged erection even before four hours.
- Sudden loss of vision or other sudden changes in eyesight.
- A sudden decrease or loss of hearing.
- Chest pain, fainting, difficulty breathing or swelling of the face, lips or tongue.
If chest pain occurs during sex, stop the activity and seek emergency care. Tell the treating team when you last took sildenafil. Do not take nitrate medicine to relieve the pain after using sildenafil.
Can Sildenafil Help With Antidepressant-Related ED?
Some antidepressants, including selective serotonin reuptake inhibitors (SSRIs), can cause sexual side effects. A clinician may consider sildenafil for erection difficulties associated with antidepressant treatment, depending on your symptoms and overall health.
Discuss the problem with the clinician managing your antidepressant. Do not stop that medicine or change its dose yourself.
Why Online Offers Without a Prescription Are Risky
An unfamiliar seller offering Viagra without a prescription may supply counterfeit or unregulated tablets. The product could contain the wrong ingredient, an unexpected dose or substances that are unsafe for you.
There is also a separate risk: even genuine sildenafil may be unsuitable because of your medical history or other medicines. A clinical assessment and a prescription filled through a reputable Australian pharmacy help address both concerns.
Is Viagra a Treatment for Women?
Viagra is not approved in Australia for treating sexual difficulties in women. It should not be treated as a general medicine for low sexual desire. A doctor can assess concerns about desire, arousal or discomfort and discuss suitable options.
What If Viagra Is Not Suitable?
Other prescription ED medicines include tadalafil, vardenafil and avanafil. Their onset and duration differ. Tadalafil, for example, can support a response to sexual stimulation for up to 36 hours, rather than causing a continuous erection.
Treatment may also include counselling, a vacuum erection device or other options recommended by a clinician. Regular exercise, stopping smoking, reducing excessive alcohol intake and managing stress can support sexual health.
Making an Informed Treatment Decision
The best starting point is a conversation about your symptoms and health. If sildenafil is prescribed, follow the instructions, check before adding new medicines and arrange a review if treatment is ineffective or causes side effects.
Remember that Viagra provides neither contraception nor protection against sexually transmitted infections.
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