Telmisartan

Key points

• Telmisartan blocks angiotensin II at the AT1 receptor, reducing vasoconstriction and aldosterone effects.
• Sartel is represented as a 40 mg single-ingredient tablet.
• Micardis HCT contains 40 mg or 80 mg telmisartan with 12.5 mg hydrochlorothiazide.
• Pregnancy exposure and changes in kidney function, potassium or fluid balance are major clinical concerns.

The ingredient boundary between the brands

Both catalogue records connect to hypertension within heart and blood pressure. The shared telmisartan ingredient does not make them the same formulation: Micardis HCT adds a diuretic with its own electrolyte, volume and metabolic effects.

The strength pairs in Micardis HCT map in ingredient order, telmisartan first and hydrochlorothiazide second. This makes 40 mg/12.5 mg and 80 mg/12.5 mg complete two-component identities rather than alternative ways to describe Sartel.

Monitoring reflects the mechanism

Blocking the renin-angiotensin system can alter kidney function and potassium, particularly during dehydration or when combined with other medicines affecting the kidneys or potassium balance. Hydrochlorothiazide can also alter sodium, potassium, uric acid and glucose.

Medicines acting directly on this system carry a boxed warning for fetal toxicity. Pregnancy or plans for pregnancy require prompt clinical review. Marked dizziness, fainting, reduced urination or facial swelling also needs timely assessment.

Further reading

• Telmisartan
• MICARDIS HCT telmisartan and hydrochlorothiazide label