Telmisartan with hydrochlorothiazide
Brand names: MicardisPlus
A fixed-dose combination of telmisartan (an angiotensin-II receptor blocker) with hydrochlorothiazide (a thiazide diuretic), used to treat hypertension not adequately controlled by either component alone.
Adult dose
Dose adjustments
Experience in mild to moderate renal impairment is modest but has not suggested adverse renal effects and dose adjustment is not considered necessary; periodic monitoring of renal function (and of potassium, creatinine and uric acid) is advised. Contraindicated in severe renal impairment (creatinine clearance less than 30 mL/min) and anuria. Telmisartan is not removed from blood by haemofiltration and is not dialysable.
Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.
Contraindications
- Hypersensitivity to any of the active substances or excipients
- Hypersensitivity to other sulphonamide-derived substances (hydrochlorothiazide is a sulphonamide derivative)
- Second and third trimesters of pregnancy
- Cholestasis and biliary obstructive disorders
- Severe hepatic impairment
- Severe renal impairment (creatinine clearance less than 30 mL/min) and anuria
- Refractory hypokalaemia, hypercalcaemia
- Concomitant use with aliskiren-containing products in patients with diabetes mellitus or renal impairment (GFR less than 60 mL/min/1.73 m2)
Side effects
- Dizziness (the most commonly reported adverse reaction)
- Angioedema, which may be serious (rare)
- Electrolyte and metabolic disturbance: hypokalaemia, hyponatraemia, hyperkalaemia, hyperuricaemia, hypomagnesaemia, hypercalcaemia (frequencies differ between the combination and the individual components and the column attribution is ambiguous in the flattened source text)
- Haematological: anaemia, eosinophilia, thrombocytopenia; rarely thrombocytopenic purpura
- Anaphylactic reaction and hypersensitivity (rare)
- Psychiatric: anxiety, depression, insomnia, sleep disorders
- Infections: bronchitis, pharyngitis, sinusitis, upper respiratory tract infection, urinary tract infection, cystitis; sepsis including fatal outcome (rare)
- Non-melanoma skin cancer (basal cell and squamous cell carcinoma) — frequency not known, hydrochlorothiazide-associated
Clinical monograph
How it works
Telmisartan blocks the angiotensin-II type-1 receptor to cause vasodilatation and reduce aldosterone-driven sodium retention, while hydrochlorothiazide inhibits the distal tubular sodium-chloride co-transporter to promote natriuresis, giving complementary blood-pressure lowering.
Prescribing in practice
- The combination is contraindicated in pregnancy because ARBs can cause serious foetal harm, so it must be stopped if pregnancy is planned or confirmed.
- Thiazide can cause hypokalaemia, hyponatraemia, hyperuricaemia and hyperglycaemia, while the ARB tends to raise potassium, so electrolyte balance and the interaction with NSAIDs (risk of acute kidney injury) need attention.
- It should not be combined with another renin-angiotensin blocker, and caution is needed in renal artery stenosis, gout and significant renal impairment.
Monitoring
Check renal function and serum electrolytes before starting and periodically during treatment, particularly after dose changes or intercurrent illness.
Counselling the patient
- Stop the tablet and seek advice if you become pregnant or are planning pregnancy.
- Report dizziness, cramps or weakness that may signal an electrolyte disturbance.
- Avoid regular over-the-counter anti-inflammatory painkillers unless advised.
Evidence & guidelines
ARB plus thiazide combinations are well-established antihypertensive therapy, and NICE guidance supports stepwise combination treatment to reach blood-pressure targets.
Reference: NICE NG136; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
Related
Curated clinical cross-links plus same-class fallbacks.
- Acute Heart Failure · ESC 2021 Heart Failure Guidelines; NICE NG106
- NSTEMI / Unstable Angina · ESC 2020 NSTEMI Guidelines; NICE NG185
- New-Onset Atrial Fibrillation · ESC 2020 AF Guidelines; NICE NG196
- Hypertensive Emergency · ESC/ESH 2018 Hypertension Guidelines; NICE NG136
- Bradycardia Management · Resuscitation Council UK ABCDE; ESC 2021 Pacing Guidelines
- Ventricular Tachycardia / Fibrillation · Resuscitation Council UK ACLS; ESC 2022 Ventricular Arrhythmia Guidelines