Telma- H

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Telma- H

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Telma- H

Property Description
Active ingredient Telmisartan and Hydrochlorothiazide (INN)
Form Oral Tablet (Fixed-Dose Combination)
Pharmacological class Angiotensin II Receptor Blocker (ARB) and Thiazide Diuretic
Common use Treatment of essential hypertension (high blood pressure)
Origin Synthetic chemical compounds

What Kind of Medicine is Telma-H?

Telma-H is a prescription-only medication classified primarily as an antihypertensive, used for the sustained management of high blood pressure, or hypertension. It is a synthetic fixed-dose combination (FDC) manufactured as an oral tablet, designed for once-daily oral administration. This combination format is an established approach for treating essential hypertension. The FDC structure is pivotal, integrating two complementary active agents into a single dose, which is clinically recognized for its efficacy over monotherapy in many cases.

Composition: Telmisartan and Hydrochlorothiazide

The medicine’s composition includes two active ingredients: Telmisartan and Hydrochlorothiazide. Telmisartan is an Angiotensin II Receptor Blocker (ARB), a pharmacological class that acts by selectively modulating blood vessel activity. The second component, Hydrochlorothiazide, is a Thiazide Diuretic, which primarily influences the balance of fluid and electrolytes in the kidneys. Combining an ARB with a thiazide diuretic is an effective method for enhancing the blood pressure-lowering effect. This specific combination (Telmisartan/Hydrochlorothiazide) is widely replicated across several generic and brand-name formulations globally.

What is the General Purpose of Telma-H?

The overarching purpose of Telma-H is to achieve robust and stable control over elevated blood pressure, particularly in adults whose hypertension is not adequately managed by Telmisartan alone. This therapeutic goal is accomplished through a dual mechanism that concurrently addresses both vascular tightness and circulatory volume. By promoting vasodilation via the ARB component and inducing diuresis via the diuretic component, the medication efficiently lowers the force exerted against the artery walls. Consistent control of blood pressure is a critical intervention used to mitigate the long-term risk of adverse cardiovascular and renal events.

Regulatory References

  1. World Health Organization

What side effects are possible with Telma- H?

Possible side effects and safety information

The safety profile for Telmisartan/Hydrochlorothiazide, as documented in regulatory sources, is defined by the adverse reactions associated with both the Angiotensin II Receptor Blocker (Telmisartan) and the Thiazide Diuretic (Hydrochlorothiazide) components.

Adverse reactions are classified by frequency according to standardized regulatory tiers. Common reactions (occurring in 1% to 10% of patients) typically involve the respiratory system (e.g., upper respiratory tract infection, sinusitis) and general symptoms like dizziness, fatigue, and diarrhea. Uncommon reactions (0.1% to 1%) may include metabolic changes such as hypokalaemia, vascular effects like hypotension, and musculoskeletal issues like back pain or muscle spasm. Rare reactions (occurring in less than 0.1% of patients) include more serious conditions like angioedema (swelling of the face or throat), sepsis, and rhabdomyolysis.

Serious adverse reactions officially documented in labeling include fetal toxicity when the medicine is used during the second and third trimesters of pregnancy, which necessitates immediate discontinuation upon detection of pregnancy. Other serious documented risks are acute renal failure, symptomatic hypotension, and severe ophthalmologic reactions such as acute myopia or secondary angle-closure glaucoma, the latter linked to the Hydrochlorothiazide component.

Safety constraints restrict the use of the medicine in certain populations. It is contraindicated in patients with severe hepatic insufficiency, cholestasis, or severe renal impairment (creatinine clearance < 30 mL/min). Official labels also note that the risk of non-melanoma skin cancer is associated with cumulative exposure to the diuretic component. Periodic determination of serum electrolytes is required due to the risk of fluid or electrolyte imbalance, particularly hypokalaemia or hyperkalaemia.

Overdose and Emergency Response

Overdose and When to Seek Help

The official documentation for Telmisartan/Hydrochlorothiazide overdose describes manifestations primarily resulting from exaggerated pharmacological effects. The most likely clinical signs are marked hypotension (severely low blood pressure), and disturbances in heart rate, including tachycardia or bradycardia. Symptoms may also include dizziness and somnolence. The Hydrochlorothiazide component specifically leads to signs of fluid and electrolyte depletion, such as hypokalaemia (low potassium) and hyponatraemia (low sodium), which can cause dehydration.

The severe outcomes documented include the risk of developing circulatory shock due to profound vasodilation and volume loss, or acute renal failure, particularly in patients with pre-existing renal impairment or severe fluid depletion.

Seek immediate medical attention for any suspected overdose, especially if symptoms such as persistent dizziness, fainting, or signs of severe fluid imbalance occur. The regulatory labeling explicitly states that no specific antidote is known for Telmisartan or Hydrochlorothiazide. Overdose management is limited to symptomatic and supportive treatment, which may include procedural steps like gastric decontamination. Intensive medical monitoring of vital signs and serum electrolytes is required for stabilization.

Therapeutic Uses of Telma- H

What Telma-H Treats: Main Uses and Benefits

Telma-H may be part of symptomatic management primarily applied in the long-term, stable management of essential hypertension. The medication is applied in contexts marked by increased discomfort or tension, which is a critical form of systemic imbalance. It is considered relevant when a patient’s elevated blood pressure is not adequately managed, requiring additional symptomatic support.

The medication is commonly used across conditions presenting with acute episodes, such as essential hypertension and conditions involving recurrent or episodic manifestations of high pressure. It supports the patient during difficult episodes by easing distress. This medication assists with maintaining a sense of stability when symptoms are more noticeable and supports general well-being during symptomatic phases.

It is applied when appropriate for adult patients in situations where patients experience symptoms related to systemic imbalance, and is commonly used to help with achieving supportive symptomatic relief. This contributes to easing the overall symptom load.


Quick Fact: Supportive relief for Persistent Arterial Pressure

Eligibility and Restrictions for Use

Population Eligibility and Non-Eligibility for Telma-H


Eligible and Restricted Populations

Use of Telma-H (Telmisartan/Hydrochlorothiazide) is indicated for adults with essential hypertension, including the older adult population where dose adjustment is typically not necessary.

The medication is not recommended for the pediatric population (children and adolescents under 18 years) because regulatory authorities have not established its safety and efficacy profile in this age group. Use is also not recommended during the first trimester of pregnancy or while breastfeeding.


Absolute Contraindications

The medicine is contraindicated (must not be used) in several high-risk groups as determined by official labeling:

  • Pregnancy: Strictly prohibited during the second and third trimesters.
  • Hypersensitivity: Patients with known allergy to Telmisartan, Hydrochlorothiazide, or any sulfonamide-derived drug.
  • Severe Organ Dysfunction: Individuals with severe renal impairment (creatinine clearance < 30 mL/min) or anuria, and those with severe hepatic impairment or biliary obstructive disorders.
  • Metabolic Issues: Patients with certain refractory electrolyte imbalances (e.g., hypokalaemia or hypercalcaemia).

Conditional Use

Use requires caution and periodic monitoring in patients with pre-existing conditions such as mild to moderate hepatic or renal impairment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for the fixed-dose combination Telmisartan/Hydrochlorothiazide (Telma-H) is defined by specific pharmacokinetic and pharmacodynamic outcomes documented in government regulatory labeling.

Documented Interaction Patterns

Co-administration with Aliskiren is contraindicated in patients with Diabetes Mellitus due to a significantly increased risk of hypotension, hyperkalemia, and impaired renal function. This combination is generally avoided in patients with moderate to severe renal impairment.

Interacting Substance/Class Official Interaction Description
Lithium preparations Reduced renal clearance of lithium, leading to increased serum concentrations and potential toxicity.
NSAIDs (Non-Steroidal Anti-Inflammatory Drugs) May reduce the antihypertensive and diuretic effects and increase the risk of renal function deterioration.
Other RAS Agents (e.g., ACE Inhibitors) Co-administration results in dual blockade of the RAS, increasing the risk of hypotension and hyperkalemia.
Potassium-Containing Products Increased risk of hyperkalemia (elevated serum potassium levels).

Administration Restrictions

Administration with Cholestyramine or Colestipol requires separation in time to prevent reduced absorption of the Hydrochlorothiazide component. The label also notes that co-administration with alcohol, barbiturates, or narcotics may potentiate orthostatic hypotension. Furthermore, the combination is not recommended for use in patients with Severe Hepatic Impairment.

Mechanism of Action

Telma-H is a fixed-dose combination product containing telmisartan and hydrochlorothiazide, which modulate physiological systems through distinct mechanisms.

Telmisartan functions as a non-peptide angiotensin II receptor-subtype 1 ( AT1) antagonist. It selectively and insurmountably blocks the binding of the endogenous ligand, angiotensin II, to the AT1 receptor, primarily located on vascular smooth muscle and the adrenal gland. AT1 receptor blockade prevents angiotensin II-mediated intracellular signaling, suppressing its direct vasoconstrictor effects and the subsequent stimulation of aldosterone synthesis and release. This interruption of the renin-angiotensin-aldosterone system (RAAS) signaling cascade results in a system-level decrease in peripheral vascular resistance.

Hydrochlorothiazide, a thiazide diuretic, acts primarily on the renal distal convoluted tubule. Its molecular target is the sodium-chloride cotransporter ( NCC). Hydrochlorothiazide non-competitively inhibits NCC, disrupting the luminal reabsorption of sodium ( Na^+) and chloride ( Cl^-) ions. This molecular inhibition leads to increased renal excretion of Na^+, Cl^-, and an associated obligatory increase in water excretion. The resulting downstream cascade is a reduction in total plasma volume and extracellular fluid volume, which decreases cardiac preload.

Dosage and Administration Information

Official Administration Guidelines

Telma-H is a prescription-only medication that is administered exclusively via the oral route as a fixed-dose combination (FDC) tablet. The official usage protocol dictates a once-daily dosing regimen, with the tablet taken at the same time each day.

The medicine is not approved for use as initial therapy for high blood pressure. Instead, its administration is reserved for adult patients whose blood pressure remains uncontrolled on monotherapy with Telmisartan or Hydrochlorothiazide alone. The initial combined dose typically starts at 80 mg Telmisartan / 12.5 mg Hydrochlorothiazide once daily.

Dosing and Procedural Requirements

Instruction Official Requirement
Timing in Relation to Meals May be administered with or without food
Tablet Administration The tablet must be swallowed whole with liquid and should not be crushed, broken, or chewed
Dose Adjustment Dose titration to a higher strength, such as 80 mg / 25 mg, is generally considered only after two to four weeks of therapy if blood pressure control is insufficient
Special Handling Due to the tablet’s moisture sensitivity, it must be removed from the sealed blister pack immediately before ingestion

Population-Specific Use

Usage instructions include high-level constraints for certain populations. For patients with mild to moderate hepatic impairment, the daily dose of Telmisartan must not exceed 40 mg (e.g., the 40 mg / 12.5 mg strength combination). The medication is generally not indicated for use in individuals with severe renal impairment (creatinine clearance less than 30 mL/min).

Recent Clinical Evidence

Research Evidence / Overview of Studies

Mechanism of Action and Early Findings

Studies have explored the basic properties of the drug. This area of study focuses on understanding how the drug interacts with the body's systems, rather than assessing clinical outcomes.


Efficacy in Acute Symptoms

Several studies examined whether the treatment was associated with a change in symptoms during acute flare-ups. These trials tracked changes in patient-reported symptom severity scores over the first 24-48 hours following administration. The design of some studies evaluated the drug's administration relative to symptom presentation.


Long-Term Outcomes

Long-term data was collected to evaluate disease activity. These studies often involved follow-up periods of one year or more, using standardized clinical measures to track disease progression. Studies also compared the drug to other treatments.


Safety and Tolerability Profile

Safety and the occurrence of adverse events were monitored across study participants. The trials collected data on common adverse events (such as mild gastrointestinal discomfort) and serious adverse events. Research has evaluated whether this drug was associated with a change in pain levels following the first dose.


Combination Therapies

A study evaluated the combination of this drug with an anti-inflammatory agent and measured the corresponding change in outcomes. This research focused on the results when administering the two agents concurrently. Research has also explored the safety and tolerability of this combination regimen.

Key Studies & References

  1. Study Details | NCT00926289 | Telmisartan 80mg Plus Hydrochlorothiazide 25mg First Line in Moderate or Severe Hypertension

Frequently Asked Questions (FAQ)

Common questions about Telma- H (FAQ)


Q: How quickly does Telma- H typically start working to lower blood pressure?

A: Official documentation indicates that the blood pressure-lowering effect from the Telmisartan component is largely noticeable within two weeks of starting treatment. The maximum blood pressure reduction, which represents the full therapeutic effect, is generally achieved after four weeks of daily administration.


Q: Is dizziness a common side effect when starting Telma- H?

A: Yes, dizziness is classified in official regulatory documents as a common adverse reaction, meaning it may affect between 1% and 10% of patients. Because the medication lowers blood pressure, there is a risk of orthostatic hypotension (a drop in blood pressure when standing up), which can potentially cause lightheadedness or dizziness.


Q: Can Telma- H cause back pain or muscle cramps?

A: Official product information lists musculoskeletal issues such as back pain and muscle spasm as uncommon adverse reactions. Reports also mention general muscle pain or cramps. Regulatory warnings indicate that electrolyte imbalance is a known risk with this type of medication, and musculoskeletal issues are reported adverse events.


Q: Can Telma- H increase the risk of developing skin cancer due to sun sensitivity?

A: Official regulatory warnings note that the risk of certain types of non-melanoma skin cancer (basal cell and squamous cell carcinoma) is increased with cumulative, long-term use of the hydrochlorothiazide component. This is not about acute sun sensitivity, but about a long-term risk linked to total exposure to the diuretic ingredient.


Q: What precautions should be taken regarding sun exposure while on Telma- H?

A: Official information advises patients taking this medication to protect their skin from sun exposure and unnecessary UV rays. This precaution is noted because of the documented increased risk of non-melanoma skin cancer linked to the diuretic component with long-term use.


Q: What happens if a person taking Telma- H experiences severe vomiting or diarrhea?

A: Severe fluid loss from vomiting or diarrhea can be a concern because this medication already lowers blood pressure and affects fluid balance. Official documentation notes that these conditions can potentially lead to hypotension (very low blood pressure) or a severe fluid or electrolyte imbalance, a risk associated with the medication's diuretic component.


Q: What evidence exists regarding the long-term cardiovascular benefits of Telma- H?

A: Telma-H is indicated for the management of high blood pressure. Regulatory indications confirm that successfully controlling high blood pressure reduces the long-term risk of adverse cardiovascular events, such as strokes and heart attacks, and this is the intended long-term benefit of using this medication.


Q: Can Telma- H affect cholesterol or lipid levels in the blood?

A: Official documentation notes hypercholesterolemia (elevated cholesterol) as a reported adverse event for the Telmisartan component. The product label states this is an adverse event, but without claiming a causal link to the drug.


Q: What happens if I miss a dose of Telma- H?

A: Official patient guidance often describes a procedure where a missed dose is taken as soon as it is remembered, unless the time for the next scheduled dose is near. Official guidance also consistently includes a caution against taking double or extra doses to make up for a missed one.


Q: What is the difference between Telma- H and plain Telma?

A: Plain Telma contains only one active ingredient, Telmisartan, which is an Angiotensin II Receptor Blocker (ARB). Telma- H is a fixed-dose combination product that contains Telmisartan plus Hydrochlorothiazide, a thiazide diuretic. The combination is used to enhance the blood pressure reduction.


Q: Does Telma- H work the same way as other 'water pills' or diuretics?

A: The diuretic component in Telma-H is Hydrochlorothiazide, which is classified as a thiazide diuretic. Its mechanism involves acting specifically on the distal convoluted tubule of the kidney to increase the excretion of sodium and water. This is a distinct action compared to other categories of diuretics, such as loop diuretics.


Q: Can Telma- H affect electrolyte levels, such as potassium or sodium?

A: Yes, official warnings indicate that the medication can affect the balance of fluid and electrolytes. This includes the risk of hypokalaemia (low potassium), hyponatraemia (low sodium), and hyperkalaemia (high potassium). Because of these risks, official warnings note that periodic monitoring of serum electrolytes may be necessary during treatment.


Q: Are there any common side effects of Telma- H that are not related to blood pressure?

A: Official adverse reaction profiles list several common reactions that are not directly tied to blood pressure effects. These include issues affecting the respiratory system, such as upper respiratory tract infection and sinusitis, as well as general symptoms like diarrhea.


Q: Is it possible to experience fatigue or tiredness while taking Telma- H?

A: Yes, fatigue (tiredness) is listed in regulatory documents as a common adverse reaction, meaning it may affect between 1% and 10% of patients. It is reported as an adverse event for the Telmisartan component generally.


Q: Does Telma- H have any effects on blood sugar levels or is it safe for people with diabetes?

A: Regulatory information indicates that the diuretic component may affect blood glucose control. Furthermore, official warnings single out patients with diabetes by contraindicating the use of this drug in combination with the agent Aliskiren. Official information notes that blood glucose control may be affected, and patients with diabetes are often advised to have appropriate monitoring during treatment.


Q: Can Telma- H cause vision changes or eye problems?

A: Yes, the Hydrochlorothiazide component is associated with a rare but serious risk of ophthalmologic (eye-related) reactions, including acute myopia (nearsightedness) and secondary angle-closure glaucoma. Official documentation also lists general abnormal vision as a reported adverse event.


Q: Is Telma- H safe to take for a long time?

A: Telma-H is indicated for the sustained management of high blood pressure, suggesting long-term use. However, official labeling contains a warning that the risk of non-melanoma skin cancer is increased with long-term use of the hydrochlorothiazide component, necessitating monitoring during chronic therapy.


Q: How does the diuretic component (Hydrochlorothiazide) affect urination frequency?

A: As a diuretic, the Hydrochlorothiazide component increases the kidney’s production of urine. This physiological function often leads to an increase in micturition frequency (how often a person needs to urinate), particularly when a person first begins taking the medication.


Q: Can Telma- H cause changes in sexual function or performance?

A: Post-marketing experience reported in official documentation for the Telmisartan component lists issues such as impotence and erectile dysfunction (ED) as adverse events. Diuretics are generally associated with a potential risk of ED.


Q: Are there any specific supplements or foods, like salt substitutes, to avoid while taking Telma- H?

A: Regulatory information specifically warns that co-administration with potassium-containing products increases the risk of hyperkalemia (high potassium). This warning applies to many salt substitutes, which often contain potassium chloride, and to potassium supplements.


Q: Are there known interactions between Telma- H and alcohol consumption?

A: Official labeling notes that using the medication concurrently with alcohol may increase the risk of orthostatic hypotension. This is a sudden drop in blood pressure when moving from sitting or lying down to standing, which could potentially cause dizziness or fainting.


Q: Is there a risk of developing a cough with Telma- H, similar to other blood pressure medicines?

A: Cough is listed as an adverse event that has occurred in clinical trials involving the Telmisartan component. The incidence rate may be low and similar to the placebo group, which is a distinction from the persistent, dry cough sometimes associated with the related class of drugs called ACE inhibitors.


Q: What should be done if a person feels dizzy after taking Telma- H?

A: Dizziness can be a sign of symptomatic hypotension (low blood pressure), a documented risk. Official documentation describes symptomatic hypotension as a potential risk, and if dizziness occurs, lying down (supine position) is described as a way to help stabilize blood pressure. Persistent or severe dizziness is a symptom that may warrant review by a healthcare provider.


Q: What is the general timeframe for seeing the full blood pressure-lowering effect of Telma- H?

A: Based on official pharmacodynamic studies, the maximum reduction in blood pressure for this medication is typically reached after about four weeks of consistent daily therapy. Dose adjustments are generally considered after two to four weeks if the blood pressure is not adequately controlled.


Q: What are the official recommendations for exercise and diet while taking Telma- H?

A: Official documentation emphasizes that the medication is part of an overall strategy for cardiovascular risk reduction. This comprehensive approach typically includes the general recommendation of appropriate exercise, diet (such as limited sodium intake), and management of other conditions like high cholesterol and diabetes.


Q: Can Telma- H be taken at the same time as other blood pressure medications?

A: Regulatory documents state that this drug may increase the blood pressure-lowering effects of other antihypertensive medicines when taken together. Co-administration with certain other classes of blood pressure medications, particularly ACE inhibitors or Aliskiren, is cautioned against or contraindicated due to increased risk of side effects like hyperkalemia.


Q: Is Telma- H related to or containing losartan?

A: Telma-H contains Telmisartan, which belongs to the pharmacological class known as Angiotensin II Receptor Blockers (ARBs). Losartan is a separate, distinct medicine that also belongs to the same ARB class. They are in the same family of medicines but are not the same drug.


Q: Can Telma- H cause difficulty sleeping or insomnia?

A: Official documentation for the Telmisartan component lists insomnia (difficulty sleeping) as a reported adverse event. If difficulty sleeping occurs, it is a recognized, although not always common, reported event.


Q: How is Telma- H described to help with fluid retention?

A: The Hydrochlorothiazide component is a diuretic that works by increasing the kidneys' excretion of water and salt. This physiological function reduces the body's total fluid volume, which is the mechanism used to help with symptoms of fluid retention and reduce blood pressure.


Q: Are there restrictions on taking potassium supplements while on Telma- H?

A: Yes, official labeling lists an interaction with potassium-containing products, including potassium supplements. Co-administration is generally restricted or requires close monitoring because it may significantly increase the risk of hyperkalemia (elevated serum potassium levels).

How should Telma- H be stored and disposed of?

How to Store and Dispose of Telmisartan/Hydrochlorothiazide Tablets

The storage and handling of telmisartan/hydrochlorothiazide tablets (Telma-H) must strictly adhere to regulatory requirements to preserve product integrity.


Official Storage Conditions

Requirement Specific Condition
Temperature Store at room temperature, typically below 25 C or 30 C.
Protection Keep from freezing. Protect tablets from moisture and light.
Packaging Store only in the original sealed blister pack until the moment of use.
Safety Keep the medicine out of the sight and reach of children and pets.

Disposal Requirements

Expired or unused telmisartan/hydrochlorothiazide must not be discarded via wastewater or standard household waste unless specifically instructed. Disposal must be completed in accordance with local regulatory requirements for pharmaceutical waste, often requiring return to a pharmacy or an official take-back program.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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