hydrochlorothiazide + telmisartan: prescribing and clinical use
Focused clinical detail for use alongside current product information, local policy and patient-specific assessment.
hydrochlorothiazide + telmisartan: clinical details
Prescribing considerations
- Confirm that hypertension is not adequately controlled by telmisartan alone before selecting the fixed combination.
- Correct clinically significant volume or sodium depletion before initiation.
- Use caution with renal artery stenosis, mild-to-moderate renal or hepatic impairment, ischaemic cardiovascular disease, valvular stenosis, obstructive hypertrophic cardiomyopathy, diabetes, gout or systemic lupus erythematosus.
- Review previous non-melanoma skin cancer, photosensitivity and any history of hydrochlorothiazide-associated acute respiratory distress.
- Safety and efficacy have not been established in patients younger than 18 years.
Contraindications and cautions
- Hypersensitivity to either active substance, relevant excipients or other sulfonamide-derived substances
- Second or third trimester of pregnancy
- Cholestasis, biliary obstruction or severe hepatic impairment
- Severe renal impairment with creatinine clearance below 30 mL/min or anuria
- Refractory hypokalaemia or hypercalcaemia
- Aliskiren use in patients with diabetes or renal impairment
- Previous acute respiratory distress syndrome following hydrochlorothiazide
Monitoring
- Blood pressure and symptoms of postural hypotension
- Renal function and volume status
- Serum potassium, sodium, magnesium and calcium
- Uric acid and gout symptoms
- Blood glucose in people with diabetes or at risk of dysglycaemia
- Skin examination and prompt assessment of suspicious lesions
Clinical pharmacology
Telmisartan selectively blocks angiotensin II at AT1 receptors. Hydrochlorothiazide inhibits sodium and chloride reabsorption in the distal renal tubule. Telmisartan may partly offset thiazide-related potassium loss, but either low or high potassium can still occur.
Formulation and product differences
- The selected Glenmark product is an uncoated, two-layer, capsule-shaped tablet.
- It contains lactose monohydrate and should remain in its moisture-protective blister until shortly before administration.
hydrochlorothiazide + telmisartan preparations and strengths
Tablet
Route: Oral
Strengths: 40 mg + 12.5 mg, 80 mg + 12.5 mg, 80 mg + 25 mg
hydrochlorothiazide + telmisartan interactions
Check prescribed, over-the-counter and complementary products with a pharmacist or prescriber. Important examples include:
Lithium
Lithium concentrations and toxicity may increase; concurrent use is generally not recommended and requires close monitoring if unavoidable.
ACE inhibitors or aliskiren
Combining renin–angiotensin system blockers increases the risk of hypotension, high potassium and kidney injury; some combinations are contraindicated.
NSAIDs such as ibuprofen
They may weaken the blood-pressure-lowering effect and increase kidney injury risk, especially with dehydration or existing renal impairment.
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.