High level view
Tadalafil is the active ingredient. Primary licensed use: treatment of erectile dysfunction (ED). Tadalafil is also prescribed for some patients with benign prostatic hyperplasia (BPH) and, under specialist supervision, for pulmonary arterial hypertension (PAH).
You may encounter product names such as "Cialis Black" online. Claims of extreme strengths (for example 800 mg) are not consistent with approved Australian formulations and strongly indicate counterfeit or unregulated products. In Australia lawful tadalafil strengths are normally 2.doses consist of 5 mg, 5 mg, 10 mg, and 20 mg.
In short, tadalafil improves the erection process by increasing blood flow to erectile tissue but does not increase libido. For practical advice on timing and how to stomach it, see Dosing procedures and administration.
Mechanism of action of tadalafil
Tadalafil is a member of the phosphodiesterase type 5 (PDE5) inhibitor family. By blocking PDE5 it helps preserve cyclic GMP levels in the smooth muscle of penile blood vessels, allowing those muscles to relax and blood flow to increase during sexual arousal. It is not an aphrodisiac and requires sexual stimulation to produce an erection.
Dosing regimen and administration
Only take tadalafil as directed by an authorised prescriber. Do not alter dose or frequency without medical advice. Tablets are usually swallowed whole and can be taken with or without food unless the product labeling or pharmacist advises otherwise.
Typical approaches used in Australia include:
- On-demand regimen: commonly 10 mg taken at least 30 minutes before sexual activity. Depending on effect and tolerability this may be changed to 5 mg or up to 20 mg as advised by your prescriber.
- Daily low-dose regimen: 2.5 mg or 5 mg once daily at the same time each day, suitable for men who anticipate frequent sexual activity or prefer continuous coverage.
Products that list extremely high strengths should be avoided. For regulatory and safety details refer to The status of legality under Australian law and Safety advisories and cautions.
Essential safety cautions and safety notices
Tell your doctor about your full medical history before starting tadalafil. Dose adjustment or avoidance may be required in some situations, including but not limited to:
- Recent heart attack or stroke, unstable angina, severe heart failure or significant arrhythmias.
- Markedly low or poorly controlled high blood pressure.
- Severe hepatic impairment or advanced kidney disease, including patients on dialysis.
- Inherited retinal disorders (for example retinitis pigmentosa) or a history of non-arteritic anterior ischaemic optic neuropathy (NAION).
- History of prolonged erections (priapism) or abnormalities of the penis such as Peyronie disease.
- Blood disorders that increase the risk of bleeding or priapism, such as sickle cell disease, leukemia or multiple myeloma.
Obtain urgent medical attention if you experience sudden vision loss, sudden hearing loss, chest pain, fainting, severe dizziness or an erection lasting longer than four hours.
Conditions that rule out its use
- Known hypersensitivity to tadalafil or any other component of the formulation.
- Concurrent use of nitrates (for example nitroglycerin or isosorbide mononitrate/dinitrate) or recreational amyl nitrite products because of the risk of dangerously low blood pressure.
- Concurrent use with riociguat, a soluble guanylate cyclase stimulator, due to additive blood pressure lowering effects.
If any of these apply to you, discuss safe varied options and options under Weigh up the options and prices.
Unintended effects
Most harmful impacts are mild and resolve without treatment. Widespread effects include:
- Headache that is accompanied by facial flushing
- Blocked nasal passages or a blocked nose
- Belly pain with indigestion or nausea
- Muscle pain, back pain or limb aches
Seek immediate medical care for severe symptoms such as chest pain, sudden loss of vision or hearing, allergic swelling, seizures or a painful erection lasting more than four hours.
Drug interacting as a shared activity considerations
Provide a full list of your medicines, including over-the-counter, herbal and complementary products, to your prescriber or pharmacist. Categories of concern include:
- Nitrates and riociguat: contraindicated. See Exclusion criteria for therapy.
- Other PDE5 inhibitors or medications used for pulmonary hypertension: combined use can increase unfavorable effects.
- Strong CYP3A4 inhibitors (for example some macrolide antibiotics, azole antifungals or certain HIV protease inhibitors) may increase tadalafil levels; strong CYP3A4 inducers (for example some anticonvulsants) may reduce its effect.
- Antihypertensives and alpha-blockers: additive lowering of blood pressure is possible; start at low doses and monitor blood pressure closely.
- Certain antiviral regimens for hepatitis C or HIV may interact significantly; specialist advice is recommended.
When in doubt, ask a pharmacist to review potential online the process of people engagings connect users across distances. before you begin the process or change any treatment.
Management tips after a failure to take a dose
- On-demand dosing: there is no fixed daily schedule. Take a single dose when required and do not exceed one dose in 24 hours unless instructed by your prescriber.
- Daily dosing: if you forget a scheduled daily tablet, take it when you remember unless it is almost time for the next dose. Do not take two tablets to make up for a a dose was skipped.
Guidance on an overdosed on pills
If an a drug overdose is suspected, seek emergency assistance or contact the Poisons Information Centre in Australia on 13 11 26. Symptoms of a drug overdose may include severe dizziness, fainting or prolonged and painful erections.
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- Store tablets at room temperature, away from heat and excessive moisture.
- Keep medicines in their original packaging and out of the reach of children and animals.
- Do not use the product after the expiry date shown on the pack.
Other options and price levels across Australia
Several treatment options exist for erectile dysfunction. Below are indicative retail price scale in Australian dollars (A$). Prices depend on brand, pack size, whether a generic is chosen conjoined with the supplier.
- Generic tadalafil (typical tablet prices): about A$1.00 to A$6.00 per tablet depending on strength and pack quantity.
- Branded Cialis (tadalafil): commonly more expensive; expect roughly A$6.00 to A$20.00 per tablet depending on strength and format.
- Sildenafil (generic Viagra): around A$1.00 to A$4.00 per tablet for generics; branded Viagra may cost A$8.00 to A$18.00 per tablet.
- Vardenafil (Levitra): less widely available; where sold expect about A$5.00 to A$15.00 per tablet.
- Avanafil (Stendra): limited availability in Australia and often pricier than older drugs; costs vary by supplier.
- Non-drug options: vacuum erection devices, intracavernosal injection therapy with alprostadil and surgical implants are choice variations for some men; discuss pointers and costs with a specialist.
Please see the additional notes:
- Products marketed as "Cialis Black 800 mg" are not recognised by the TGA and are likely counterfeit; avoid them.
- Most ED medicines are not subsidised under the Pharmaceutical Benefits Scheme (PBS) for many patients; confirm current billing rates with your pharmacy.
- Make a comparison generic options and talk to your prescriber about the most cost effective and clinically appropriate choice.
For rules about importing medicines for personal use and safe online purchasing refer to Australia's legal standing.
Status recognized by law and regulatory notes for the file in Australia
Tadalafil is a Schedule 4 prescription-only medicine in Australia and is regulated by the Therapeutic Goods Administration (TGA). You must have a valid prescription from an Australian-registered prescriber to obtain tadalafil lawfully from Australian pharmaceutical stores.
Only TGA-registered products in approved strengths (commonly 2.5 mg, 5 mg, 10 mg and 20 mg) should be supplied. Unapproved strengths or unlisted products may be illegal to import or supply.
When buying online, use reputable Australian pharmacies that verify prescriptions. Pharmacists are required to review and confirm prescriptions before dispensing.
Personal importation: under the TGA A Personal Importation Scheme you may import up to a three month supply of a prescription medicine for personal use provided you hold a valid prescription and meet other conditions. Border authorities may seize medicines that do not meet requirements.
Direct-to-consumer promotion of prescription medicines is restricted within the Commonwealth of Australia. Use prescription medicines only as directed by a qualified prescriber and do not share prescribed medicines with others.
If you are unsure whether a product is approvedtake a quick look and verify. the Australian Register of Therapeutic Goods (ARTG) or consult your pharmacist for verification.
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