Broad view
Sildenafil citrate is the active ingredient in many erectile dysfunction medicines. Products sold under the name Kamagra contain sildenafil, the same molecule used in licensed brands, and work by relaxing penile blood vessels so blood inflow increases during sexual stimulation, which can help produce and maintain an erection.
Dosage strengths commonly seen are 25 mg, 50 mg and 100 mg, although specific tablet strengths and packaging differ between makers and markets. Note that Kamagra is not an approved brand in Australia; sildenafil is supplied in Australia only via prescription through approved brands and generics.
For guidance on legally obtaining sildenafil in Australia, see the law related section: Summary of legal standing in Australia.
How to Apply and Dose
Typical clinical recommendations are as follows. Your doctor may change the dose depending on how you respond and on any knock-on effects.
- Start dose for most adults: 50 mg taken 30 to 60 minutes before sexual activity. Adjustment to 25 mg or 100 mg may be appropriate.
- You may take only one dose in each 24 hour period.
- It can be taken with food. A fatty meal may delay onset of effect.
- Avoid heavy drinking around the time you take it because alcohol can reduce benefit and increase dizziness.
If you feel the effect is too weak or after effects are troublesome, speak as advised by your prescriber. Alterations to the dosage should be made only with medical supervision.
Safety Tips and Safeguards
Before you embark sildenafil tell your clinician about your full medical history. Particular attention will be paid to heart and eye problems.
- Tell your prescriber if you have heart disease, recent heart attack or stroke, uncontrolled blood pressure, or an irregular heartbeat.
- Report any history of blood disorders, prolonged erections, severe hepatic or renal impairment, or inherited retinal disorders such as retinitis pigmentosa.
- Stand up slowly from sitting or lying positions to lower the chance of feeling dizzy or faint.
- Do not use more than one drug for erectile dysfunction at the same time.
- Avoid grapefruit juice near the time you take sildenafil because it can increase drug levels.
- Not for use by persons younger than 18 years.
- Athletes should note sildenafil is not a performance enhancer; current World Anti Doping Agency guidance does not list it as prohibited, but disclose medication use to sports medical staff when required.
Seek urgent care if an erection lasts beyond four hours (priapism), or if you experience severe chest pain, sudden changes to vision or hearing, or signs of an allergic reaction.
Where use is contraindicated
Do not take sildenafil if any of the following apply:
- You are allergic to sildenafil or any inactive ingredients in the product.
- You are using organic nitrates in any form, including nitroglycerin or isosorbide compounds, because the combination can cause dangerous low blood pressure.
- You are currently taking riociguat or other soluble guanylate cyclase stimulators.
If you are unsure whether sildenafil is safe for youplease take a moment to check. with your doctor or pharmacist and read the product information provided when the medicine is dispensed.
Possible reactions to treatment
The majority of harmful bodily effects are mild and of short duration. Frequently reported reactions include:
- Headache syndrome, flushing of the face, lightheadedness
- Indigestion, blocked nose, nausea
- Transient visual changes such as a blue tint or increased sensitivity to light
Serious but less common events include sudden loss of vision, sudden hearing loss, chest pain, fainting, or a prolonged erection lasting four hours or more. Seek emergency medical help if any of these occur.
Interaction Potential Between Medications
Sildenafil can interact with a number of medicines. Key dynamics you need to know about include:
- Organic nitrates - never combine these with sildenafil due to risk of severe hypotension.
- Alpha blockers used for prostate symptoms or high blood pressure - may cause symptomatic low blood pressure; medical guidance is needed on timing and dosing.
- Strong CYP3A4 inhibitors (for example some HIV protease inhibitors and azole antifungals) - can increase sildenafil blood levels and worsen indirect effects.
- Enzyme inducers such as rifampin and certain anticonvulsants - may reduce sildenafil concentrations and its effectiveness.
Give your prescriber and pharmacist a complete list of prescription medicines, over the counter medicines, vitamins and herbal supplements you take before starting sildenafil.
For information about legally sourcing medicines and risks with imports see: The status of legality within Australia.
Missed dose event incident
Sildenafil is usually taken as needed, so there is no standard i skipped one dose instruction. Do not take an extra tablet to make up for a missed occasion. Follow any specific directions given by your prescriber for a regular schedule if one applies.
Overdose situation Management Actions
Signs of an to overdose may include extreme dizziness, fainting, chest pain, irregular heartbeat, severe nausea, or a prolonged erection. If you suspect an to overdose, seek emergency medical assistance immediately. In Australia call 000 for emergency services.
Warehousing and Handling Procedures
- Keep the medicine in its original packaging at room temperature away from moisture and heat.
- Avoid storing near sinks or in bathrooms where humidity is high.
- Put meds out of reach of kids and pets. Dispose of unused medicines through local take back programs or as advised by your pharmacist.
Options and Price Catalog (AUD)
If sildenafil is not suitable or you prefer another option, several other PDE5 inhibitors are available. The approximate out of pocket price per tablet in Australia can vary widely depending on brand, pack size and whether the prescription is private or subsidised.
- Generic sildenafil (25 mg, 50 mg, 100 mg): roughly AUD 5 to 25 per tablet depending on supplier and pack size.
- Viagra (branded sildenafil): commonly around AUD 15 to 40 per tablet for typical pack sizes.
- Tadalafil (Cialis) 10 mg or 20 mg: typically AUD 15 to 40 per tablet; tadalafil lasts longer (up to 36 hours) and daily low dose options affect cost calculations.
- Vardenafil (Levitra or Staxyn where available): often AUD 15 to 35 per tablet when stocked in the Commonwealth of Australia.
- Avanafil, also known as Spedra: where available, commonly priced around AUD 15 to 30 per tablet.
Notes on choice and cost:
- Prices shown are indicative and will change; always compare licensed pharmacies and accredited telehealth providers for up to date costs.
- Some people prefer tadalafil for its longer window of action; others prefer sildenafil for its shorter effect and lower cost per occasion.
- Discuss different substitutes with your prescriber if potential side effects arise or if sildenafil does not meet your needs.
For rules about importing medicines for personal use and other legal framework considerations see Legal condition in Australia.
Status of legal standing within Australia
Key regulatory points to consider when obtaining sildenafil in Australia:
- Sildenafil is classified as a Schedule 4 prescription only medicine under Australian law and must be supplied with a valid prescription by a registered health professional and dispensed by a pharmacist.
- Purchasing prescription medicines from overseas suppliers without an Australian prescription may breach the Therapeutic Goods Act and exposes you to counterfeit or substandard products.
- Under the Personal Import Plan Australians may import up to a three month supply for personal use provided they hold a valid prescription and meet customs and biosecurity requirements; imports remain subject to inspection and may be detained or refused.
- Advertising of prescription medicines directly to the public is restricted in the Commonwealth of Australia.
- For product registration and safety information summary consult the Therapeutic Goods Administration with the addition of the Australian Register of Therapeutic Goods (ARTG).
When unsure, obtain a prescription from an Australian prescriber and buy from a licensed Australian pharmacy or an accredited telehealth service to ensure product quality and legal compliance.
FAQs in a Flash
- How quickly does sildenafil work? Many people notice effect in 30 to 60 minutes, but onset may be slower after a large or fatty meal.
- How long does it last? Typical duration is 4 to 6 hours, though individual responses vary.
- Could I drink alcohol? Light drinking may be acceptable, but heavy alcohol reduces effect and raises side effect risk.
- Can I take it with blood pressure medicines? Some antihypertensives are compatible, but nitrates must never be combined with sildenafil. Alpha blockers require careful management.
- Is Kamagra identical to Viagra? Both may contain sildenafil, but brand approval, quality control and legal availability differ. Prefer medicines obtained lawfully inside Australia. See Legal position in Australia details.
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