Vidalista Pro (Tadalafil): Comprehensive Patient Information for Australia
Basic Product Information
| Active Pharmaceutical Ingredient (INN) | Tadalafil |
|---|---|
| Common Australia Brand Names | Vidalista Pro, Cialis, Adcirca |
| ATC Code | G04BE08 |
| Available Forms & Strengths | Tablets: 2.5 mg, 5 mg, 10 mg, 20 mg, 40 mg (film-coated) |
| Manufacturers | Centurion Laboratories, Lilly Australia, various generics |
| Prescription Status | Prescription only (S4) |
Tadalafil is an oral medication prescribed under various brand names, including Vidalista Pro. It’s primarily used to treat erectile dysfunction (ED), benign prostatic hyperplasia (BPH), and pulmonary arterial hypertension (PAH). In Australia, it is classified as a prescription-only medicine (Schedule 4).
Mechanism of Action
For patients: Tadalafil helps increase blood flow to certain areas of the body. In the case of erectile dysfunction, it relaxes muscles in the blood vessels of the penis, making it easier to get and keep an erection when sexually aroused.
For healthcare professionals: Tadalafil is a selective phosphodiesterase type 5 (PDE5) inhibitor. By inhibiting PDE5, it prevents the breakdown of cyclic guanosine monophosphate (cGMP) in the corpus cavernosum, enhancing nitric oxide–mediated vasodilation in response to sexual stimulation. This leads to improved erectile function. For pulmonary hypertension and BPH, the same smooth muscle relaxation enhances blood flow and eases lower urinary tract symptoms.
Pharmacokinetics
- Absorption: Well-absorbed orally; peak concentration within 30–120 minutes after intake (median ~2 hours), not significantly affected by food.
- Metabolism: Primarily hepatic via CYP3A4 enzyme to active/inactive metabolites.
- Elimination: Mainly via faeces (approx. 61%) and urine (approx. 36%).
- Duration of Action: Tadalafil has a long half-life (~17.5 hours), supporting daily or ‘on-demand’ dosing. Effects on erectile function can last up to 36 hours (“the weekend pill”).
Everyday Use and Best Practices
- Typical Starting Dose (ED): 10 mg before potential sexual activity; adjust between 5–20 mg as needed.
- Once-Daily Use: For regular activity or BPH, 2.5 mg or 5 mg taken at the same time each day.
- Take the tablet whole with water, with or without food.
- Do not exceed one dose per 24 hours.
- Missed Dose: If on daily therapy, take as soon as remembered but never double up.
- For optimal results, allow at least 30–60 minutes before anticipated sexual activity when using ‘on demand’.
Discuss any pre-existing conditions (heart, liver, kidney problems) or other medicines with your GP or pharmacist before starting. Regular reviews may be necessary to ensure best outcomes and safety.
Dosing: Morning vs Evening
- Morning Dosing: May provide flexibility for sexual activity throughout the day and into the evening due to the extended action. This is especially suitable for those preferring spontaneity.
- Evening Dosing: Preferred if sexual activity is typically in the evening; may reduce overnight side effects such as headache or back pain in some people.
- Consistency in timing is key for daily regimens; pick a time that best fits your lifestyle.
- No significant difference in effectiveness based on timing; personal preference and tolerability should guide choice.
Taking with Food or on an Empty Stomach
- Tadalafil can be taken with or without food — food does not notably affect absorption or overall effect.
- Large, high-fat meals may slightly delay the onset of action in some people but does not reduce efficacy.
- Standard English/Australian diet (including breakfast or dinner use) is not problematic.
- Avoid excessive grapefruit/juice as it can interact with metabolism.
Interaction Warnings
| Substance/Class | Potential Effect | Recommendation |
|---|---|---|
| Nitrates (GTN, isosorbide) | Severe hypotension (dangerously low BP) | Contraindicated — never use together |
| Alpha-blockers (e.g., doxazosin) | Risk of low BP, dizziness, fainting | Use only with close medical supervision |
| CYP3A4 inhibitors (ketoconazole, erythromycin) | Increased tadalafil levels — more side effects | May require lower dose or avoid |
| Alcohol | May increase risk of side effects (dizziness, low BP) | Moderation recommended (no more than 1–2 standard drinks) |
| Other PDE5 inhibitors (sildenafil, vardenafil) | Increased risk of adverse effects | Do not use together |
| Grapefruit/grapefruit juice | Raises tadalafil levels by slowing breakdown | Limit or avoid |
| Antihypertensives | Potential for additive BP lowering effects | Monitor closely |
Indications
| Approved Indications |
|
|---|---|
| Off-label/International Indications |
|
Dosing by Clinical Indication
| Indication | Usual Adult Dose | Pediatric | Elderly or Renal/Liver Impairment |
|---|---|---|---|
| Erectile Dysfunction (on demand) | 10 mg 30–60 min before activity; max 1x/24hrs | Not indicated | Start at 5 mg; monitor closely |
| Erectile Dysfunction (daily) | 2.5 mg–5 mg once daily, at same time | Not indicated | Lower dose and close monitoring |
| Benign Prostatic Hyperplasia (BPH) | 5 mg once daily | Not indicated | Consider 2.5–5 mg; assess tolerability |
| Pulmonary Arterial Hypertension | 40 mg once daily | >2 years: Specialist only | Caution; individualise |
Safety Profile and Side Effects
| Frequency | Side Effects | Notes |
|---|---|---|
| Common (>1%) |
| Often transient, mild-moderate |
| Occasional |
| Contact GP if persistent/serious |
| Rare |
| Discontinue and seek immediate medical help |
Guidelines for Proper Use (Australian Context)
- Always take as prescribed and do not share with others.
- Purchase only from regulated Australian pharmacies or NHS-dispensing clinics.
- Store at room temperature, away from excess moisture and heat.
- Keep out of reach of children and pets.
- Attend regular GP reviews for repeat prescriptions and to monitor for side effects or interactions.
- It is recommended to notify your pharmacist if you start or stop any medication, vitamin, or supplement.
- Check your eligibility for PBS (Pharmaceutical Benefits Scheme) support with your pharmacist; not all indications may be funded.
Alternative Treatment Options
- Sildenafil (Viagra, various generics): Shorter effect (4–6 hours), on-demand use, reimbursed for some groups via PBS.
- Vardenafil (Levitra): Similar to sildenafil; not routinely subsidised.
- Avanafil (Spedra): Faster onset, shorter duration; private script required.
- Non-drug options: Vacuum erection devices, psychosexual therapy, lifestyle changes.
- Injection or pellet formulations: For those unresponsive to oral medicines.
Discuss with your GP or specialist which choice is safe and effective for you; sildenafil is most commonly subsidised.
Legal, Registration, and Reimbursement Status in Australia
- Regulatory Authority: Therapeutic Goods Administration (TGA)
- Prescription only (S4) medicine; legal to be dispensed from authorised pharmacies.
- Reimbursement/PBS: Limited availability for certain conditions (PAH); erectile dysfunction use typically not subsidised except under defined medical or social circumstances.
- Not available over-the-counter, nor for general purchase online without a valid prescription.
- Importation: Legal with valid prescription and personal importation restrictions observed (up to 3 months supply).
Latest Research and Clinical Guidelines (2022–2025)
- Recent Australian and international guidelines endorse Tadalafil as a first-line therapy for ED and BPH, thanks to its efficacy, convenience, and well-established safety profile.
- Cited works:
- Australian Therapeutic Guidelines: Sexual and Reproductive Health (2022-2024 Edition)
- European Association of Urology: Guidelines on Erectile Dysfunction (2023)
- Montorsi F et al., “Efficacy and Safety of Tadalafil in Men with ED: Long-term & on-demand data,” Int J Impot Res 2024.
- Emerging research continues into use for LUTS, BPH, and comorbid cardiovascular patients, as well as ongoing safety monitoring in long-term prescription users.
Availability and Delivery
| Pack Sizes | Indicative Price Range (AUD, private) | Delivery (Major Cities) |
|---|---|---|
| 2, 4, 8, 14, 28 tablets | $15–$110 depending on strength/pack size |
|
Frequently Asked Questions (FAQ)
- Q: How quickly does Vidalista Pro (Tadalafil) work and how long does it last?
A: It usually begins working within 30–60 minutes, and can last up to 36 hours. Sexual stimulation is needed to achieve an erection. - Q: Can I drink alcohol while using Tadalafil?
A: Moderate consumption (no more than 1–2 standard drinks) is generally safe; large amounts may increase side effects such as dizziness or lowered blood pressure. - Q: What should I do if I experience a prolonged erection (over 4 hours)?
A: Seek immediate medical attention. Prolonged erections (priapism) can cause permanent damage if untreated. - Q: Do I need to take Tadalafil every day?
A: Only if prescribed as a daily regimen. For most men, it’s used as needed, but daily dosing may suit those with frequent sexual activity or BPH symptoms. - Q: Is a prescription really necessary in Australia?
A: Yes, Tadalafil is prescription-only (S4) and must be prescribed by an Australian registered medical practitioner and dispensed by a licensed pharmacy.
For further questions or personalised advice, consult your Australian GP, urologist, or pharmacist.
