Micardis (Telmisartan): Comprehensive Patient Information for Australia
Basic Product Information
| International Nonproprietary Name (INN) | Telmisartan |
|---|---|
| Australia Brand Names | Micardis, Telmisartan Apotex, Telmisartan Sandoz, Telmisartan Mylan, among others |
| ATC Code | C09CA07 |
| Available Forms & Strengths | Oral tablets: 20 mg, 40 mg, 80 mg |
| Major Manufacturers | Boehringer Ingelheim, Apotex, Sandoz, Mylan |
| Prescription Status | Prescription Only Medicine (Schedule 4, S4) |
Mechanism of Action
For Patients: Micardis contains telmisartan, a medication that lowers blood pressure by relaxing blood vessels. It works by blocking the actions of a hormone called angiotensin II, which normally narrows your blood vessels. By blocking this hormone, Micardis allows your blood vessels to stay open and relaxed, making it easier for your heart to pump blood around your body.
For Specialists: Telmisartan is a non-peptide angiotensin II receptor antagonist (ARB), selectively blocking the AT1 subtype. This inhibition results in reduced vasoconstriction, decreased aldosterone secretion, and a subsequent reduction in blood pressure without significant effects on heart rate or cardiac output.
Pharmacokinetics
- Absorption: Rapid but variable; bioavailability is approximately 50% after oral administration.
- Metabolism: Minimal hepatic metabolism; mainly excreted unchanged.
- Elimination: Half-life is about 24 hours, allowing for once daily dosing; eliminated primarily in faeces via biliary excretion, minimal renal clearance.
- Duration of Action: Sustained; provides 24-hour blood pressure control.
Use in Everyday Life and Best Practices
Typical Doses: Adults usually start at 40 mg once daily, with adjustments depending on response, up to a maximum of 80 mg once daily. Always follow your doctor’s instructions on dosage.
- Take your tablet at the same time every day to maintain steady blood levels.
- Swallow tablets whole with water; do not crush or chew.
- Integrate your medication into a daily routine (e.g., after brushing your teeth) to help remember it.
- Consult your healthcare provider before making any changes to your medication or daily routine.
Dosing in the Morning vs Evening
Morning: Many Australians prefer taking blood pressure medication in the morning, which aligns with healthcare guidance and routine GP visits. It may also help to track side effects or therapy success during the day.
Evening: For some patients, evening dosing may offer improved overnight blood pressure control. However, possible nocturnal hypotension (especially in seniors) should be considered.
Tip: Choose the time that fits best for you and stick to it. If unsure, ask your GP or pharmacist for individual recommendations.
Taking With Food or on an Empty Stomach
Micardis can be taken with or without food, as food has minimal impact on its absorption. Many Australians find it easier to take the tablet with breakfast or another regular meal to help with adherence. A healthy diet following the Australian Dietary Guidelines (e.g., fresh fruit, vegetables, whole grains, reduced salt) can enhance blood pressure management.
Interaction Warnings
Micardis may interact with certain foods, drinks, or medications. Please discuss with your doctor or pharmacist before starting any new medicines or supplements.
| Interacting Substance | Possible Effect/Precaution |
|---|---|
| Potassium-rich foods/supplements | May increase risk of hyperkalaemia (high potassium). Limit excessive intake of bananas, oranges, or salt substitutes. |
| Diuretics (e.g., frusemide, hydrochlorothiazide) | May increase BP-lowering effect and risk of kidney effects; may be used together under medical supervision. |
| Non-steroidal anti-inflammatory drugs (NSAIDs, e.g., ibuprofen) | May reduce antihypertensive effect; possible risk of kidney impairment. |
| ACE inhibitors (e.g., perindopril) | Severe risk of hyperkalaemia, kidney impairment, low BP; dual therapy only under specialist guidance. |
| Alcohol | May increase blood pressure–lowering effects (dizziness, fainting). Limit or avoid excessive intake. |
| Lithium | May increase lithium levels; requires monitoring. |
| Other antihypertensives | Additive effects possible—discussion with your GP required. |
Indications
| Indication | Registration Status |
|---|---|
| Essential hypertension (high blood pressure) | Approved |
| Reduction of cardiovascular morbidity in adults at high risk (including diabetics) | Approved |
| Off-label: Heart failure (if intolerant to ACE inhibitors) | Specialist discretion (not PBS-approved for this indication) |
| Diabetic nephropathy, proteinuria reduction | Off-label (special circumstances) |
Dosing According to Clinical Indications
| Population | Indication | Recommended Dose | Notes |
|---|---|---|---|
| Adult | Hypertension | 40 mg once daily (may increase to 80 mg as required) | Can be used alone or in combination |
| Adult | Cardiovascular risk reduction | 80 mg once daily | For patients at high cardiovascular risk |
| Elderly | All indications | As above; no dosage adjustment generally needed | Cautious titration advised, consider fall risk |
| Paediatric | Not routinely recommended | Limited data; specialist involvement only | Safety not established |
| Renal or hepatic impairment | Hypertension | No initial adjustment; monitor closely | Avoid in severe hepatic impairment |
Safety Profile and Side Effects
Most people tolerate Micardis well. Side effects are generally mild, but all medicines can cause some effects. If you have concerns, contact your doctor or pharmacist.
| Common Side Effects (≥1%) | Rare/Serious Effects | Warnings/Precautions |
|---|---|---|
| Dizziness, headache, fatigue Cough Mild back pain | Allergic reactions (rash, swelling, difficulty breathing), severe hypotension, kidney function deterioration, angioedema | Not recommended in pregnancy or breastfeeding; caution in severe liver or kidney disease; regular blood pressure monitoring needed |
Guidelines for Proper Use in Australia
- Always take your medicine exactly as prescribed by your GP.
- Regularly monitor your blood pressure at home and note your readings.
- Attend all scheduled reviews for check-ups and blood tests (monitoring kidney function and electrolytes).
- Do not stop Micardis abruptly without consulting a healthcare professional.
- Australian heat: Stay well hydrated, especially during summer. Seek medical advice if feeling faint or dehydrated.
- Keep Medications out of reach of children.
- If you miss a dose, take it as soon as remembered. If nearly time for your next dose, skip the missed dose. Do not double up.
Alternative Treatment Options
- Angiotensin Receptor Blockers (ARBs): Candesartan, Irbesartan, Losartan, Valsartan – similar efficacy, differing profile of side-effects and duration. All are covered under the Pharmaceutical Benefits Scheme (PBS).
- ACE Inhibitors: Perindopril, Ramipril, Enalapril – effective for hypertension/heart protection, but more likely to cause cough or angioedema.
- Calcium Channel Blockers: Amlodipine, Felodipine – potent BP-lowering, fewer metabolic effects; can cause ankle swelling.
- Thiazide Diuretics: Indapamide, Hydrochlorothiazide – effective, especially for salt sensitivity; mild diuretic side effects.
Each option has unique advantages and drawbacks. Your GP or specialist will tailor therapy to your health profile, medication tolerability, and potential benefits in line with Australian guidelines.
Legal, Registration and Reimbursement Status in Australia
- Legal Classification: Schedule 4 (S4, Prescription Only Medicine)
- Regulator: Therapeutic Goods Administration (TGA); prescription required from an authorised prescriber
- Subsidies: Available via the Pharmaceutical Benefits Scheme (PBS) for approved indications (hypertension, risk reduction)
- Registration ongoing—refer to TGA for current product status and safety updates
- Supply may only be dispensed by registered Australian pharmacies
Latest Research and Clinical Guidance (2022–2025)
- The Australian National Heart Foundation guidelines (2023) recommend ARBs like telmisartan as first-line treatment for hypertension, especially in those intolerant to ACE inhibitors.
- Recent trials (e.g., SPRINT and contemporary meta-analyses) suggest ARBs provide robust cardiovascular and renal protection.
- Clinical guidance supports early combination therapy with other antihypertensives for improved blood pressure control and protection against heart disease and stroke.
References: National Heart Foundation of Australia (2023), The Lancet (2024), European Society of Cardiology (2023).
Availability and Delivery
Micardis and generic telmisartan tablets are widely available in Australian pharmacies, both in metro and regional areas. Delivery options vary by pharmacy, with many offering quick dispatch for online or telehealth prescriptions.
| Pack Size | Typical PBS Price (concession/general) | Delivery to Sydney | Melbourne | Brisbane | Perth | Adelaide |
|---|---|---|---|---|---|---|
| 30 tablets (40 mg) | $6.70 / $20–$30 per pack | Next-business day | Next-business day | 1–2 business days | 2–4 business days | 1–2 business days |
| 30 tablets (80 mg) | $6.70 / $20–$30 per pack | Next-business day | Next-business day | 1–2 business days | 2–4 business days | 1–2 business days |
Note: Prices and delivery times may vary depending on the pharmacy, PBS status, and your location. Always enquire directly with your local or online pharmacy for personalised information.
Frequently Asked Questions (FAQ)
- Can I drive or operate machinery while taking Micardis?
Most people can drive or operate machinery safely with Micardis. However, if you feel dizzy or lightheaded after taking your medication, avoid these activities until you feel well. - What should I do if I miss a dose?
Take your missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take your next dose at the regular time. Never take a double dose. - Is Micardis safe during pregnancy or breastfeeding?
No. Telmisartan is not recommended in pregnancy or breastfeeding. Use effective contraception if of childbearing potential, and inform your doctor immediately if you become pregnant. - Are there any foods I should avoid?
Try to limit high potassium foods (such as bananas and tomatoes) and avoid salt substitutes containing potassium, as these may increase risk of high potassium, especially if you have kidney concerns. - Will Micardis cure my hypertension?
Micardis helps control high blood pressure but does not cure it. It is important to keep taking your medication as prescribed, along with lifestyle changes for long-term health.
