Telma-H

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Telma-H

Method of action: Antihypertensive, Diuretic

Treatment option: Hypertension

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

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 Ingredients Telmisartan, Hydrochlorothiazide
Form Oral Tablet
Pharmacological Class ARB + Thiazide Diuretic (Antihypertensive)
General Purpose Management of high blood pressure (Hypertension)
Origin Synthetic

1. Defining the Telma-H Combination: Type and Classification

Telma-H is a synthetic, prescription-only medication administered as an Oral Tablet that is classified as a dual-agent Antihypertensive Agent. The medication is a Fixed-Dose Combination Product, meaning it systematically integrates two distinct active compounds from different pharmacological classes into a single solid oral form. This combination is clinically recognized for achieving successful blood pressure goals in a single administration.

The medication's primary utility is to provide consistent normalization of arterial pressure, a strategy used in clinical management, particularly when single-agent therapy proves insufficient.

2. Composition and Drug Form: Telmisartan and Hydrochlorothiazide

The core of the medication’s identity lies in its two synthetic active ingredients: the International Nonproprietary Names (INN) Telmisartan and Hydrochlorothiazide (HCTZ). Telmisartan is scientifically known as a non-peptide Angiotensin II Receptor Blocker (ARB), while Hydrochlorothiazide belongs specifically to the thiazide diuretic class, commonly referred to as a “water pill.”

The final dosage form is an Oral Tablet, created by embedding these two active substances within a pharmaceutical excipient matrix suitable for ingestion. This fixed-dose formulation ensures that both the mechanism targeting vascular tone and the mechanism controlling fluid volume are simultaneously introduced into the body.

3. The Dual Action Principle and General Purpose

The overall general purpose of Telma-H is the effective management of hypertension, achieved through its combined therapeutic principle. This dual action is rooted in Telmisartan's role in blocking the action of a hormone that naturally causes blood vessels to constrict, thus promoting their relaxation and widening. Concurrently, Hydrochlorothiazide increases the excretion of excess salt and water by the kidneys, which serves to reduce the total fluid volume circulating in the body. This complementary effect on both vascular resistance and blood volume is central to the drug's utility in normalizing arterial pressure, a key step in reducing the risk of cardiovascular events.

Regulatory References

  1. DailyMed: Telmisartan and Hydrochlorothiazide Label

What side effects are possible with Telma-H?

Possible side effects and safety information

The safety profile of Telma-H (Telmisartan/Hydrochlorothiazide) is officially documented according to governmental regulatory classifications, which organize adverse events by frequency and the body system affected. These regulatory profiles define the officially reported risks and the explicit limitations on the drug's use.

Adverse effects are categorized to distinguish between typically encountered reactions and rare, clinically significant events. Common reactions documented include dizziness, upper respiratory tract infection, and diarrhoea. Uncommon effects include syncope, tachycardia, orthostatic hypotension, and the potential for electrolyte disturbances such as hypokalemia (low potassium).

Classification Examples of Officially Documented Adverse Reactions
Common Dizziness, Diarrhoea, Upper respiratory tract infection
Uncommon Tachycardia, Hypokalemia, Orthostatic hypotension

Regulatory documents also highlight specific serious adverse reactions. These include angioedema (swelling of the face, tongue, and throat), which is reported as rare and potentially life-threatening. The Hydrochlorothiazide component is also associated with a rare risk of acute myopia and secondary angle-closure glaucoma. Furthermore, the combination may cause or worsen acute renal failure in susceptible patients.

Safety Restrictions and Contraindications: The official label defines patient circumstances under which the medication must not be used. Telma-H is contraindicated during the second and third trimesters of pregnancy due to the risk of fetal injury. Use is also restricted in individuals with severe hepatic impairment, anuria (absence of urine production), and known hypersensitivity to the active substances or to sulfonamide-derived drugs. Safety and efficacy in the pediatric population have not been established.

Overdose and Emergency Response

Overdose and when to seek help — Official Regulatory Information for Telma-H

Overdose scope

Domain Description (Strictly based on Official Regulatory Documentation)
Documented overdose presentations: Overdose symptoms are defined by excessive hypotension (low blood pressure) and signs of fluid and electrolyte imbalance, which may include tachycardia (rapid heart rate), asthenia (weakness), drowsiness, and muscle cramps.
Physiological systems affected: The Cardiovascular System (leading to profound blood pressure drop); The Renal System (risk of acute renal insufficiency); and Fluid/Electrolyte Balance (low serum potassium/sodium).
Emergency-response statements: The official directive is to seek immediate medical attention. Help is required at once for a suspected overdose, specifically instructing to contact a poison control center or emergency room.

Overdose classifications (high-level)

Classification Type Regulatory Statement (Strictly Label-Based)
Severity classification: Potential outcomes include severe, life-threatening complications such as circulatory shock and acute renal insufficiency.
Overdose-context constraints: No specific antidote is known for either component; therefore, management must be symptomatic and supportive treatment.

Resulting overdose structure

  • The principal clinical manifestation of overconsumption is severe hypotension and accompanying fluid and electrolyte imbalance.
  • Severe outcomes formally documented include the risk of circulatory shock and potential acute renal insufficiency.
  • Management requires symptomatic and supportive treatment, including the required correction of fluid and electrolyte imbalance.

Connection to the overall overdose profile

Regulatory documents define the overdose profile by detailing the severe effects of excessive blood pressure reduction and volume loss, which necessitate the mandatory immediate medical attention. The structure specifies that because a dedicated reversal agent is absent, medical response is restricted to documented supportive procedures and continuous monitoring of vital signs and electrolyte levels.

Therapeutic Uses of Telma-H

The primary role of Telma-H (Telmisartan/Hydrochlorothiazide) plays a role in the management of Essential Hypertension (conditions marked by increased physiological stress). This combination therapy is considered relevant when high blood pressure remains inadequately controlled by a single medication.

This medication is commonly used to help stabilize persistently elevated systolic and diastolic arterial pressure readings that create noticeable physiological strain. This combination is applied in addressing conditions involving episodic or fluctuating manifestations of high pressure, particularly in high-risk patient groups like older adults or individuals with diabetes.

A primary goal of this therapy is applied across domains where additional symptomatic support is needed. This approach to consistent normalization of arterial pressure supports general well-being during symptomatic phases and may assist with maintaining functional stability. The combination contributes to easing the overall symptom load and supports patients during difficult episodes.


Quick Fact: Relief for Physiological Strain

Eligibility and Restrictions for Use

Eligibility Status for Telma-H

Telma-H (Telmisartan/Hydrochlorothiazide) is officially approved for use in adult patients (ge 18 years) diagnosed with Essential Hypertension when blood pressure is inadequately controlled by Telmisartan monotherapy. This combination is generally permitted for use in older adults, though greater sensitivity is noted in some individuals.

Population Official Regulatory Status
Pregnancy Contraindicated in the second and third trimesters. Not recommended in the first trimester.
Organ Function Contraindicated in severe hepatic impairment (including cholestasis) and severe renal impairment (Creatinine Clearance < 30 mL/min or anuria).
Pediatric Use Not recommended; safety and efficacy have not been established in children and adolescents.
Co-administration Contraindicated with Aliskiren in patients who have diabetes mellitus or moderate to severe renal impairment.

Use is also contraindicated for any known hypersensitivity to the active substances, excipients, or other sulfonamide-derived medicines. The medicine is not recommended for breastfeeding mothers. Patients with mild to moderate hepatic or renal impairment may use the medicine, but must do so under cautious and monitored conditions, as documented in official regulatory labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Telma-H (telmisartan/hydrochlorothiazide) can interact with several medicinal products and substance classes, which may require monitoring or dosage adjustments by a healthcare provider.

Contraindicated and Not Recommended Combinations

Dual blockade of the Renin-Angiotensin-Aldosterone System (RAAS) with an Angiotensin II Receptor Blocker (ARB) like telmisartan and either an ACE inhibitor or a direct renin inhibitor (e.g., Aliskiren) is generally not recommended due to increased risk of hyperkalemia, hypotension, and renal impairment. The co-administration of Aliskiren is specifically contraindicated in patients with diabetes. Products containing Lithium should be avoided, as this combination can increase the risk of lithium toxicity.

Interactions Requiring Close Monitoring

  • Potassium-Sparing Diuretics and Supplements: Co-administration with agents that increase serum potassium (e.g., potassium supplements, potassium-sparing diuretics) can increase the risk of hyperkalemia.
  • Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): NSAIDs, including COX-2 inhibitors, may reduce the blood pressure-lowering effect of this medicine and increase the risk of worsening kidney function, particularly in elderly or volume-depleted patients.
  • Digoxin: Concomitant use may increase the plasma concentration of digoxin, requiring the monitoring of digoxin levels.
  • Bile Acid Sequestrants: Cholestyramine and Colestipol resins can reduce the absorption of the hydrochlorothiazide component; separating the administration time by at least four hours is typically necessary.

Monitoring of blood pressure, kidney function, and electrolyte levels is essential when combining this product with many of these interacting agents.

Mechanism of Action

How Telma-H Works: Pharmacodynamic Mechanism

The dual action of Telma-H is achieved through the independent mechanisms of Telmisartan and Hydrochlorothiazide.

Angiotensin II Receptor Blockade

Telmisartan functions as a selective antagonist of the Angiotensin II Type 1 ( AT1) receptor. By binding to and blocking this receptor, Telmisartan interrupts the signaling cascade of the Renin-Angiotensin-Aldosterone System (RAAS). This action prevents the endogenous mediator Angiotensin II from stimulating the AT1 receptor, thereby modulating signaling that would otherwise lead to smooth muscle contraction. This results in the reduction of peripheral vascular resistance.

Renal Volume and Electrolyte Modulation

Hydrochlorothiazide operates within the renal system, primarily targeting the distal convoluted tubule. It acts as an inhibitor of the sodium-chloride co-transporter ( NCC) on the luminal membrane of renal cells. This inhibition reduces the reabsorption of sodium and chloride ions, leading to increased excretion of water and electrolytes in the urine. This mechanism contributes to the modulation of circulating fluid volume.

Synergistic Hemodynamic Adjustment

These two distinct pathways—vascular relaxation via AT1 blockade and fluid reduction via NCC inhibition—operate synergistically. This complementary dual mechanism engages multiple regulatory systems to adjust systemic hemodynamics by decreasing both peripheral resistance and volume load simultaneously.

Dosage and Administration Information

Administration Guidelines for Telma-H

Telma-H is an oral tablet that is designated as a step-up therapy; it is not indicated for starting treatment in patients with essential hypertension. Its use is reserved for adult patients whose blood pressure remains inadequately controlled by either telmisartan or hydrochlorothiazide monotherapy alone.


Standard Dosing and Administration

Feature General Administration Guidelines
Route of Administration Oral. Tablets must be swallowed whole with liquid.
Frequency Once daily, taken at the same time each day.
Starting Dose Typically, 80 mg/12.5 mg (Telmisartan/HCTZ) once daily, upon switching from monotherapy.
Maximum Dose The dose may be titrated up to a maximum of 160 mg/25 mg once daily, if required.
Timing & Handling May be taken with or without food. Tablets should be removed from the sealed blister immediately before use due to moisture sensitivity.
Dose Adjustment Interval Changes to the dose strength are generally evaluated and made after 2 to 4 weeks of treatment.
Missed Dose If a dose is missed, the instructions are to skip that dose and take the next dose at the usual scheduled time. A double dose must not be taken.

Population-Specific Dosing Rules

Specific restrictions and maximum limits apply for certain patient groups. For older adults, no initial dose adjustment is typically necessary. However, for patients with mild to moderate hepatic impairment, the daily dose is restricted and should not exceed 40 mg/12.5 mg. The combination is not recommended or contraindicated in patients with severe hepatic impairment or severe renal impairment (creatinine clearance < 30 mL/min) due to the hydrochlorothiazide component. The safety and efficacy of Telma-H have not been established in the pediatric population.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Phase 3 Clinical Trials on Activity

Research has explored the drug's activity in models of pain. Trial results report on findings related to the drug’s activity across studies of acute and chronic pain conditions. Specific research has been conducted into the drug’s profile in different patient groups, including those with kidney function impairment.

Activity in Chronic Inflammatory Conditions

Studies evaluated the combination and patient-reported outcomes, including measures related to mobility and chronic inflammation markers. A meta-analysis examining results across five trials reported various outcomes related to reducing subjective pain scores over a 12-week period.

Research protocols have often involved administration with food, and some studies have noted potential interactions with alcohol consumption. The review of clinical trial data suggests findings are variable, and it is not yet clear whether a specific combination provides better results than monotherapy.

Tolerability Profile

The drug’s tolerability profile has been examined in clinical settings, and its activity in the context of moderate pain has been the focus of research, with time-to-onset being a common metric. The documented safety data includes common adverse events reported in these studies.

Long-term Data and Special Populations

Several large-scale trials have explored whether the drug affected quality of life for long-term users, with particular attention to elderly populations. Findings were mixed, with some studies reporting a statistically significant change in certain quality-of-life metrics, while others found no clear association compared to a placebo group.

Research has also investigated its activity in populations with post-operative discomfort. The available evidence remains limited to specific dosages and durations of use as documented in the primary research protocols. It is not yet established if the drug has a different safety profile when used outside of the investigated therapeutic area.

Key Studies & References 52-Week Safety and Quality of Life Assessment of Drug X in an Elderly Cohort

Frequently Asked Questions (FAQ)

Common questions about Telma-H (FAQ)

Q: What is Telma-H, and what is it used for?

Telma-H is a combination medication containing telmisartan and hydrochlorothiazide. It is primarily used to treat high blood pressure (hypertension) in adults. Telmisartan is an Angiotensin II Receptor Blocker (ARB), and hydrochlorothiazide is a thiazide diuretic (water pill).

  • Telmisartan works by relaxing blood vessels, which allows blood to flow more easily.
  • Hydrochlorothiazide helps remove excess water and salt from the body, leading to lower blood volume.

Q: How should I take Telma-H?

Telma-H is typically taken once daily by mouth. It can be taken with or without food. Follow your healthcare provider's instructions exactly regarding the dosage and timing. Try to take your dose at the same time each day to help maintain consistent control of your blood pressure.

  • Do not crush, chew, or break the tablet; swallow it whole.
  • If you miss a dose, take it as soon as you remember, unless it is close to your next scheduled dose. In that case, skip the missed dose and resume your regular schedule. Do not take two doses at once.

Q: What are the common side effects of Telma-H?

Common side effects of Telma-H may include:

  • Dizziness or lightheadedness (especially when standing up)
  • Fatigue
  • Nausea
  • Diarrhea
  • Upper respiratory tract infections (such as the common cold)

If any side effects persist or worsen, you should talk to your healthcare provider. This medication can also cause changes in blood potassium and sodium levels, which are usually monitored through blood tests.

Q: Can Telma-H affect my kidneys?

Yes, Telma-H can affect kidney function, particularly in patients who already have kidney problems, are severely dehydrated, or have severe heart failure. Both telmisartan and hydrochlorothiazide require careful monitoring in individuals with kidney impairment. Your healthcare provider will likely perform blood tests (such as serum creatinine and GFR) to check your kidney function before and during treatment with Telma-H.

Notify your doctor immediately if you notice a decrease in urination or swelling in your feet or ankles while taking this medication.

Q: What should I avoid while taking Telma-H?

While taking Telma-H, it is important to be cautious about:

  • Potassium supplements and salt substitutes: Since the telmisartan component can increase potassium levels and the hydrochlorothiazide component can decrease them, use of potassium supplements or salt substitutes containing potassium chloride should be discussed with your doctor.
  • Drinking alcohol: Alcohol can further lower your blood pressure and increase the risk of dizziness or lightheadedness.
  • Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): Medications like ibuprofen or naproxen can reduce the blood pressure-lowering effect of Telma-H and may increase the risk of kidney problems.
  • Becoming dehydrated: As a diuretic, Telma-H increases urine output. Drink plenty of fluids as directed by your doctor, but be aware that excessive sweating, vomiting, or diarrhea can lead to dehydration and low blood pressure.

How should Telma-H be stored and disposed of?

Storage and Protection Requirements

Telma-H (Telmisartan/Hydrochlorothiazide) tablets must be stored at controlled room temperature, generally between 20 C and 25 C, and kept from freezing.

Due to the hygroscopic nature of the tablets, they must remain in the original sealed blister pack for protection against moisture and light. The medicine should only be removed from the blister immediately before the dose is taken.

Child Safety and Disposal

For safety, the medication must be stored in a secure location, out of the sight and reach of children.

Official disposal protocols require that you do not keep outdated medicine. You must consult a pharmacist or healthcare professional for instructions on the proper disposal of any unused or expired tablets, ensuring compliance with local pharmaceutical waste regulations.

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

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