Tadacip (Tadalafil): Comprehensive Patient Information for Australia
Basic Product Information
| International Nonproprietary Name (INN) | Tadalafil |
|---|---|
| Australian Brand Names | Tadacip, Cialis, Adcirca |
| Therapeutic Class (ATC code) | G04BE08 (Drugs used in erectile dysfunction) |
| Available Forms and Strengths | Oral tablets: 5 mg, 10 mg, 20 mg |
| Manufacturers | Cipla, Eli Lilly, various generics |
| Prescription Status | Schedule 4 (Prescription only medicine) in Australia |
Mechanism of Action
Simple terms: Tadacip (Tadalafil) helps to increase blood flow to certain areas of the body by relaxing the blood vessels. It primarily helps men achieve and maintain an erection, but it can also be used to treat other conditions such as benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension.
For specialists: Tadalafil is a selective phosphodiesterase type 5 (PDE5) inhibitor. Inhibition of PDE5 results in increased levels of cyclic guanosine monophosphate (cGMP), promoting relaxation of smooth muscle and enhancing blood flow in the corpus cavernosum. In pulmonary hypertension, Tadalafil’s vasodilatory effect benefits the pulmonary vascular bed.
Pharmacokinetics
- Absorption: Rapidly absorbed after oral administration; peak plasma concentrations occur within 30 minutes to 6 hours (median ~2 hours).
- Metabolism: Extensively metabolised in the liver, primarily via CYP3A4.
- Elimination: Mainly via faeces (approximately 61%), and urine (36%).
- Half-life: Approximately 17.5 hours, allowing its "once-daily" and "on-demand" use.
- Duration of action: Up to 36 hours after a single dose (sometimes called the “weekend pill”).
Use in Everyday Life and Best Practices
Typical doses:
- Erectile dysfunction (ED): 10 mg taken at least 30 minutes before sexual activity; may be increased to 20 mg or decreased to 5 mg based on individual efficacy and tolerability.
- BPH or combined ED/BPH: 5 mg taken at the same time each day.
- Pulmonary arterial hypertension: Usually 40 mg (2 x 20 mg) once daily, under specialist supervision.
In Australia, Tadacip is used in line with PBS (Pharmaceutical Benefits Scheme) criteria for specific conditions and following TGA (Therapeutic Goods Administration) guidance. It is important to discuss with your GP or urologist which dosing regimen is most suitable for your condition and lifestyle.
Dosing: Morning vs Evening
Tadalafil can be taken in the morning or evening. Taking it at the same time every day helps ensure stable blood levels, especially for daily regimens (such as for BPH or pulmonary hypertension). For "on-demand" use in ED, timing should be at least 30 minutes before anticipated activity. Some patients prefer evening doses to coordinate with sexual activity, while others prefer mornings for routine. Choose a time that fits your daily schedule for better adherence.
- Advantages of morning dosing: May fit with routine; easier to remember.
- Advantages of evening dosing: Coordinates with evening social or intimate activities.
- Tip: Pick a consistent time to minimise the chance of missing a dose.
Taking with Food or on an Empty Stomach
Tadacip can be taken with or without food. Meals—whether light, large, fatty or traditional Australian cuisine (e.g. barbecue, meat pies)—do not significantly affect absorption or action. Unlike some medications, there’s no requirement to take it on an empty stomach. However, heavy or fatty meals may slightly delay onset, so for rapid effect, consider a lighter meal beforehand.
Interaction Warnings
| Interacting Agent | Effect/Recommendation |
|---|---|
| Nitrates (e.g. GTN spray, isosorbide dinitrate) | Severe, potentially life-threatening drop in blood pressure. Never use together. |
| Alpha-blockers | Risk of symptomatic hypotension; monitor blood pressure closely. |
| Other PDE5 inhibitors (e.g. sildenafil, vardenafil) | Do not combine due to increased risk of side effects. |
| Alcohol | May increase hypotensive effects; excessive consumption may impair sexual performance and increase risk of adverse reactions. |
| CYP3A4 inhibitors (e.g. ketoconazole, ritonavir) | May raise Tadalafil levels and increase side effects; dose adjustment recommended. |
| Grapefruit juice | May increase Tadalafil levels; best avoided. |
| Antihypertensive medications | Additional blood pressure lowering effect. |
Indications
| Official (TGA-approved) | Off-label/Other |
|---|---|
|
|
Dosing According to Clinical Indication
| Patient Group | Indication | Starting Dose | Max. Dose |
|---|---|---|---|
| Adults | Erectile dysfunction ("on-demand") | 10 mg before activity | 20 mg before activity |
| Adults | BPH or maintenance therapy | 5 mg once daily | 5 mg once daily |
| Adults | Pulmonary hypertension | 40 mg (2 x 20 mg) once daily* | 40 mg daily |
| Elderly >65 yrs | All indications | Same as adults, but increased sensitivity; consider lower starting dose | As tolerated |
| Children | Not recommended (safety/efficacy not established). | N/A | N/A |
*Pulmonary hypertension usage under respiratory or cardiology specialist guidance only.
Safety Profile & Side Effects
Most side effects are mild and temporary, but some can be serious. Contact your doctor if you experience any unexpected reactions.
| Common Side Effects (>1%) | Uncommon/Rare | Warnings/Serious Effects |
|---|---|---|
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|
|
Tell your doctor about any side effects, especially if severe or prolonged.
Guidelines for Proper Use (Practical Tips for Australia)
- Always take Tadalafil/tadacip exactly as prescribed by your GP or specialist.
- Do not use with any nitrate medication (for heart conditions or angina).
- If you miss a daily dose, take it as soon as you remember, but skip if near the time for your next dose.
- Store in a cool, dry place, under 25°C; do not store in bathroom or near heat sources.
- Avoid excess alcohol (max 2 standard drinks), as this may increase side effects and lessen benefit.
- Discuss with your prescriber if you have significant liver or kidney impairment, cardiovascular disease, or are taking multiple medications.
- Only purchase from licensed, TGA-registered pharmacies; beware of online counterfeit medicines.
- Inform your doctor about all other medicines or supplements you use (including herbal remedies and over-the-counter doses).
Alternative Treatment Options
- Sildenafil (Viagra, generic): Shorter acting (~4–6h); inexpensive; usually used "on demand".
- Vardenafil (Levitra): Similar duration to sildenafil; used as needed.
- Avanafil (Spedra): Faster onset; similar duration; not always PBS reimbursed.
- Alprostadil (Caverject, Muse): Injectable or urethral; used when oral agents ineffective; higher cost, more invasive.
- Penile pump/vacuum device: Non-drug option; available for self-purchase or via medical device scheme; may be eligible for reimbursement in some states.
Tadalafil’s main advantages are its long duration (up to 36 hours) and suitability for daily dosing. For occasional use or where cost is a concern, sildenafil may be preferred. Your prescriber or pharmacist can help tailor the best option for your needs.
Legal, Registration, and Reimbursement Status in Australia
- Approval: Registered with the Therapeutic Goods Administration (TGA) for ED, BPH, and PAH.
- Legal classification: Schedule 4 medicine (Prescription Only Medicine).
- PBS (Pharmaceutical Benefits Scheme): Subsidised for certain indications (notably, pulmonary hypertension; not always for ED or BPH).
- Supply: Only via prescription from a registered medical practitioner; dispensing by Australian pharmacist.
Latest Research and Clinical Guidance (2022–2025)
- A 2023 consensus from the Australian Urological Society affirms Tadacip/Tadalafil among the mainstays of ED and BPH management, emphasising its flexibility for daily or on-demand regimens (Smith et al, Med J Aust, 2023).
- NICE guidelines (UK, 2022) and TGA guidance highlight its favourable side effect profile and long duration, but note the importance of avoiding contraindicated drugs (like nitrates).
- Recent global meta-analyses corroborate its safety across adult ages when used as prescribed (Jordan et al., Sexual Medicine Reviews, 2024).
- Tadalafil’s role in female sexual dysfunction and Raynaud’s remains experimental and is under specialist investigation (AUS/UK trials, 2025).
Availability and Delivery in Australia
| Popular Pack Sizes | Indicative Price* (AUD) | Usual Delivery Timeline |
|---|---|---|
| 4 tablets (20mg) | $25–$40 | 1–2 business days (Sydney, Melbourne, Brisbane), 2–4 days (Perth, Adelaide), 3–6 days (Darwin, Hobart, regional/remote) |
| 28 tablets (5mg) | $45–$70 | As above |
| 56 tablets (5mg) | $85–$130 | As above |
*Prices vary by pharmacy, insurance/PBS status, and location. Delivery times are averages and may vary by region/public holidays.
Frequently Asked Questions (FAQ)
- 1. How quickly does Tadacip (Tadalafil) start working?
Most patients notice results within 30 to 60 minutes after taking the tablet. For optimal effect, take it at least half an hour before intended sexual activity. - 2. Is it safe to use Tadalafil with alcohol or Australian food?
Moderate alcohol (1–2 standard drinks) is generally safe, but high amounts should be avoided. Australian cuisine—including meat, seafood, and dairy—does not significantly affect action. - 3. Can I use Tadacip every day?
Yes, for BPH and some ED patients, a daily low dose (5mg) is suitable. Always follow medical advice. - 4. What should I do if I miss a dose?
For daily dosing, take missed dose as soon as you remember—unless it’s nearly time for your next dose. For 'as needed' use, take only as prescribed. - 5. Do I need a prescription in Australia?
Yes, Tadalafil is prescription-only and should be obtained from your GP or specialist, and dispensed by an Australian-registered pharmacist.
For further information: Discuss with your GP, sexual health clinic, or speak to your pharmacist. For urgent safety concerns, consult the TGA or local hospital emergency department.
