Category Name Cardio-Diabetic / Angiotensin Receptor Blocker (ARB) & Thiazide Diuretic / Antihypertensive
Common Indications TELMOSAR-H is indicated for the management of hypertension and associated cardiovascular risk reduction, particularly when single-agent therapy is insufficient for adequate blood pressure control. It is commonly prescribed for:
- Hypertension (high blood pressure) requiring combination antihypertensive therapy
- Blood pressure management in patients not adequately controlled on Telmisartan or Hydrochlorothiazide alone
- Cardiovascular risk reduction in patients with hypertension and associated risk factors such as type 2 diabetes or left ventricular hypertrophy
- Oedema associated with mild to moderate hypertension requiring concurrent diuretic therapy
- Prevention of stroke, heart attack, and other major cardiovascular events in high-risk hypertensive patients
- Hypertension with concurrent fluid retention requiring both vasodilation and diuretic action
Common Dosings One tablet (Telmisartan 40 mg + Hydrochlorothiazide 12.5 mg) orally, once daily — with or without food — or as directed by your physician. Take at the same time each day to maintain consistent blood pressure control. The dose may be titrated by the treating physician based on individual clinical response, blood pressure targets, and tolerability. Do not abruptly discontinue this medication without consulting your doctor. Ensure adequate hydration during therapy, particularly in hot weather or during physical exertion, to avoid excessive fluid loss from the diuretic component.
Common Side Effects The following side effects may occur during the course of treatment. Consult your doctor if any of these persist or worsen:
- Fatigue or weakness
- Dizziness or lightheadedness — particularly upon standing
- Nausea or upset stomach
- Decreased magnesium levels in blood (hypomagnesaemia) — may present as muscle cramps or weakness
- Electrolyte imbalances including low potassium (hypokalaemia) and low sodium (hyponatraemia) — inform your doctor if you experience muscle weakness, cramps, or irregular heartbeat
- Increased urinary frequency due to the diuretic component
- Dehydration or excessive thirst with prolonged use
- Elevated blood uric acid levels — monitor in patients with gout
- Skin rash or photosensitivity — avoid prolonged sun exposure during therapy
- Serious allergic reactions such as facial swelling, difficulty breathing, or severe skin reactions — seek immediate medical attention if severe
Common Interactions Inform your doctor about all medications, supplements, and herbal products you are currently taking. Notable interactions include:
- Potassium Supplements / Potassium-Sparing Diuretics (Spironolactone, Amiloride): Concurrent use with Telmisartan may significantly increase the risk of hyperkalaemia (elevated blood potassium levels) — regular serum potassium monitoring is strongly recommended
- NSAIDs (Ibuprofen, Diclofenac): May reduce the antihypertensive effectiveness of both components and increase the risk of renal impairment — avoid long-term concurrent use without medical supervision
- Lithium: Hydrochlorothiazide may increase plasma lithium concentrations, raising the risk of lithium toxicity — regular lithium level monitoring is mandatory if concurrent use is unavoidable
- Other Antihypertensives / Diuretics: Concurrent use may significantly enhance the blood pressure-lowering effect, potentially causing excessive hypotension — use under close medical supervision with regular blood pressure monitoring
- Antidiabetic Medications (Insulin, Oral Hypoglycaemics): Hydrochlorothiazide may impair glucose tolerance and alter insulin requirements in diabetic patients — blood glucose monitoring should be intensified
- Digoxin: Hydrochlorothiazide-induced hypokalaemia may increase the risk of digoxin toxicity — regular serum electrolyte and digoxin level monitoring is advised
- Cholestyramine & Colestipol: May reduce the absorption of Hydrochlorothiazide — administer TELMOSAR-H at least 2 hours before or 4 hours after these agents
Special Instructions
| Condition | Guidance |
|---|---|
| Pregnancy | Not recommended during pregnancy. Positive evidence of foetal risk has been observed. Use of ARBs and diuretics during the second and third trimesters may cause serious harm to the developing foetus including renal damage and oligohydramnios. Strictly avoid — consult your doctor immediately if pregnancy is detected during therapy. |
| Breastfeeding | May be unsafe during lactation. Both components may pass into breast milk. Consult your doctor before use and consider a safer alternative during breastfeeding. |
| Alcohol | The safety of concurrent alcohol use has not been fully established. Alcohol may enhance the blood pressure-lowering effect, increasing the risk of dizziness, lightheadedness, and fainting — limit or avoid alcohol during therapy. |
| Driving & Machinery | May cause dizziness, fatigue, or visual disturbances that could impair driving ability — particularly during the initial phase of therapy. Avoid driving or operating heavy machinery until you know how this medication affects you. |
| Liver Disease | Use with caution in patients with hepatic impairment. Telmisartan is primarily eliminated via biliary excretion — use is not recommended in patients with biliary obstruction or severe liver disease. Consult your physician before use. |
| Kidney Disease | Use with caution in patients with renal impairment. Regular monitoring of renal function, serum electrolytes, and blood pressure is recommended. Not recommended in patients with severe renal insufficiency or anuria — consult your physician for individualised guidance. |
Mechanism of Action TELMOSAR-H combines two active ingredients from complementary pharmacological classes, each working through a distinct mechanism to provide superior and sustained blood pressure control:
Telmisartan (40 mg): A long-acting, selective angiotensin II type 1 (AT1) receptor blocker (ARB) that works by competitively and specifically blocking the binding of angiotensin II — a potent vasoconstrictor hormone — to its AT1 receptors on vascular smooth muscle and the adrenal gland. By blocking these receptors, Telmisartan prevents angiotensin II from causing vasoconstriction, sodium retention, and aldosterone release, resulting in vasodilation, reduced peripheral vascular resistance, and a sustained reduction in blood pressure. Unlike ACE inhibitors, Telmisartan does not inhibit bradykinin breakdown, significantly reducing the risk of dry cough as a side effect
Hydrochlorothiazide (12.5 mg): A thiazide diuretic that works by inhibiting sodium and chloride reabsorption in the distal convoluted tubule of the kidney. This promotes the urinary excretion of sodium, chloride, and water, reducing plasma volume and cardiac preload, thereby lowering blood pressure. The diuretic-induced reduction in plasma volume also enhances the vasodilatory response to Telmisartan
Together, by combining angiotensin II receptor blockade (Telmisartan) with diuretic-mediated volume reduction (Hydrochlorothiazide), TELMOSAR-H provides a synergistic dual-mechanism approach to blood pressure management — achieving more effective, sustained, and comprehensive cardiovascular protection than either agent alone.
Instructions to Take
- Take this tablet exactly as prescribed by your doctor
- May be taken with or without food — however, take it at the same time each day to maintain consistent blood pressure control
- Swallow the tablet whole with a full glass of water — do not crush, split, or chew
- Monitor your blood pressure regularly as advised by your physician and report any unusual fluctuations
- Ensure adequate fluid intake throughout the day to avoid dehydration from the diuretic component — particularly in hot weather or during physical exertion
- Due to the diuretic effect, take this tablet preferably in the morning to avoid disruption of sleep from increased urinary frequency at night
- Do not abruptly stop this medication without consulting your doctor — sudden discontinuation may cause rebound hypertension
- Rise slowly from a sitting or lying position to minimise the risk of dizziness or sudden drop in blood pressure
- Diabetic patients should monitor blood glucose levels closely as Hydrochlorothiazide may affect glucose tolerance
- Do not self-medicate, adjust the dose, or add other blood pressure or diuretic medications without medical advice
- If a dose is missed, take it as soon as you remember — however, skip the missed dose if it is almost time for the next scheduled dose. Do not double the dose to make up for a missed one
- Limit or avoid alcohol throughout the course of treatment
- Keep out of reach of children
- Store in a cool, dry place away from direct sunlight and moisture
Disclaimer: This information is intended for general reference purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting, changing, or stopping any medication.
