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Olsar 20 mg

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Olsar 20 mg

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Medically reviewed

Laura Arias

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.

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Overview of Olsar 20 mg

Property Description
Active Ingredient Olmesartan Medoxomil
Form Oral Tablet
Pharmacological Class Angiotensin II Receptor Blocker (ARB)
Common Use Management of High Blood Pressure (Hypertension)
Prescription Status Prescription-only (Rx)

Olsar 20 mg is a prescription-only (Rx) medication that contains the active ingredient olmesartan medoxomil. The 20 mg strength specifies the exact quantity of the active compound present in each oral tablet. It is commonly prescribed to adults for the long-term management of high blood pressure, medically known as essential hypertension.

The active component, olmesartan medoxomil, belongs to a class of drugs called Angiotensin II Receptor Blockers (ARBs). Medications in this class work to relax blood vessels, which in turn lowers blood pressure. It is classified as a prodrug, meaning it requires conversion inside the body to become its therapeutically active form, olmesartan, upon absorption. This unique pharmacological characteristic is recognized for providing effective, once-daily blood pressure control, which improves patient adherence to treatment.

By effectively managing blood pressure, Olsar 20 mg helps to reduce the long-term risk of serious cardiovascular complications. Olmesartan medoxomil is used for the treatment of essential hypertension. The medication is a recognized tool for maintaining a consistently controlled blood pressure level, which is vital for preserving overall cardiac and kidney health.

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What side effects are possible with Olsar 20 mg?

Possible Side Effects and Safety Information

The officially documented adverse effects of Olmesartan Medoxomil (Olsar 20 mg) are classified by frequency and grouped into System-Organ Classes (SOCs) according to regulatory labeling. These classifications reflect the medication's systemic safety profile as assessed in clinical trials.

Adverse Reactions by Frequency

Classification Examples of Documented Effects
Common (affecting 1 in 10 to 1 in 100 people) Dizziness, headache, fatigue, pharyngitis, sinusitis, bronchitis, nausea, diarrhea, abdominal pain, back pain, arthritis, hyperkalaemia, elevated liver enzymes.
Uncommon (affecting 1 in 100 to 1 in 1000 people) Vertigo, angina pectoris, vomiting, rash, urticaria, anaemia, face oedema.
Rare (affecting 1 in 1000 to 1 in 10,000 people) Angioedema, drug hypersensitivity, Acute Renal Failure, Rhabdomyolysis.

Serious Adverse Reactions and Safety Constraints

Serious Adverse Reactions explicitly noted in regulatory documents include Angioedema (swelling of the face, lips, tongue, or throat) and Acute Renal Failure. Hypotension (abnormally low blood pressure) is also a potentially serious reaction that may occur following the initiation of treatment.

Population-Specific Safety Constraints are mandated for certain patient groups:

  • Pregnancy: The medication is contraindicated during the second and third trimesters due to the risk of fetal injury. Discontinuation is required as soon as pregnancy is detected.
  • Severe Hepatic Impairment: Olsar 20 mg is contraindicated in individuals with severe liver disease.

Safety warnings also exist regarding the potential for Hyperkalaemia (high potassium) and the deterioration of renal function when Olmesartan Medoxomil is co-administered with specific interacting agents, such as potassium supplements or certain non-steroidal anti-inflammatory drugs (NSAIDs).

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Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Olmesartan Medoxomil overdose is characterized by the risk of excessive hypotension (severely low blood pressure), which is the primary physiological consequence of overexposure. This profound drop in blood pressure dictates the documented clinical manifestations and the required emergency actions.

Documented Manifestations Official Emergency Actions Supportive Management
Fainting Seek immediate medical attention. Treatment is supportive only.
Dizziness or lightheadedness Contact Poison Control (1-800-222-1222). Patient should be placed in the supine position (lying flat).
Fast or slow heartbeat Call emergency services (911) if the person has collapsed, had a seizure, or has trouble breathing. May require intravenous infusion of normal saline for symptomatic low blood pressure.

An overdose is considered a potentially severe scenario, with the primary life-threatening outcome being hypotensive shock. The official labeling confirms that the dialysability of olmesartan is not established, meaning clinical procedures focus on reversing the severe hemodynamic effects of the low blood pressure.

Connection to the overall overdose profile: Regulatory documents define the overdose profile by focusing on the severe hemodynamic risk and the resulting clinical signs, such as fainting. This risk explicitly triggers the mandatory emergency actions, instructing users to contact help immediately for signs of collapse or unresponsiveness. The required clinical steps are focused entirely on supportive stabilization of blood pressure.

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Therapeutic Uses of Olsar 20 mg

What Olsar 20 mg Treats: Main Uses and Benefits

Olsar 20 mg is fundamentally used for the long-term control of Essential Hypertension, a chronic condition where blood pressure is persistently elevated. The medication is considered relevant for the management of essential hypertension in adults and is commonly used in appropriate pediatric patients (aged 6 and older). Olsar 20 mg is relevant for easing the symptoms that create noticeable physiological strain. The sustained pressure moderation is applied across domains where additional symptomatic support for conditions involving episodic or fluctuating manifestations is needed. The long-term support assists with maintaining functional stability during periods of heightened symptoms.

The medication is relevant in situations with significant discomfort associated with elevated blood pressure. The therapeutic benefit supports the patient during difficult episodes by easing distress on the organs linked to chronic high pressure. This therapeutic support contributes to easing the overall symptom load caused by chronic high pressure.

“This therapeutic support contributes to easing the overall symptom load caused by chronic high pressure.”

Olsar 20 mg is applied in addressing the noticeable physiological strain in specific patient groups, such as older adults with isolated systolic hypertension and pediatric patients, and is used in situations involving certain distressing symptoms when additional management is required.


Quick Fact: Relief for Chronic Physiological Stress Olsar 20 mg is commonly used for conditions marked by increased physiological stress due to sustained high blood pressure, assisting in the long-term management of cardiovascular and renal health risks.

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Eligibility and Restrictions for Use

Who Can and Cannot Use Olsar 20 mg? (Olmesartan)

This section outlines the eligibility profile for Olsar 20 mg based strictly on official regulatory documentation, defining groups for whom use is allowed, restricted, or prohibited.

Contraindications: Populations Who Must Not Use Olsar

Use of Olsar 20 mg is strictly contraindicated in several patient groups, meaning it must not be used under any circumstances due to significant risks defined in official labeling:

  • Pregnancy: Women who are pregnant, particularly during the second and third trimesters.
  • Hypersensitivity: Patients with a known allergy or hypersensitivity to olmesartan medoxomil or any component of the formulation.
  • Concomitant Therapy: Patients with diabetes mellitus or moderate-to-severe renal impairment (GFR less than 60 mL/min/1.73 m^2) who are concurrently taking aliskiren-containing medicines.
  • Biliary Obstruction: Patients diagnosed with biliary obstruction or jaundice.

Use Restrictions and Special Populations

Usage is subject to specific official restrictions for the following groups:

  • Pediatric Age: Use is not recommended in children younger than 1 year of age. Use is generally established for children 6 to 16 years of age.
  • Lactation: Use is not recommended in breastfeeding women.
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What should I know about interactions with other medicines?

Olsar 20 mg (olmesartan medoxomil) has formally documented interaction patterns centered on pharmacodynamic effects and the potential to alter drug exposure.

The co-administration of Aliskiren is strictly contraindicated in patients with a diagnosis of diabetes due to a heightened risk of adverse outcomes. Its use is also specifically avoided in patients with existing renal impairment (GFR less than 60 mL/min).

A major regulatory caution exists for the dual blockade of the Renin-Angiotensin System (RAS). Combining olmesartan with ACE Inhibitors, other ARBs, or Aliskiren significantly increases the risk of hypotension, hyperkalemia (elevated serum potassium), and renal impairment. Similarly, co-administration with potassium-sparing diuretics, potassium supplements, or salt substitutes containing potassium may lead to documented increases in serum potassium.

Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) may reduce olmesartan's antihypertensive effect and increase the risk of renal dysfunction, particularly in elderly or volume-depleted patients.

A specific timing rule is required for Colesevelam hydrochloride, a bile acid sequestering agent. To prevent a reduction of olmesartan systemic exposure, olmesartan must be administered at least 4 hours prior to the Colesevelam dose. Finally, co-administration with Lithium is documented to increase serum lithium concentrations, leading to a risk of lithium toxicity.

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Mechanism of Action

Olsar 20 mg contains the prodrug Olmesartan medoxomil, which is rapidly hydrolyzed to the active compound, olmesartan, an angiotensin II receptor blocker (ARB). This drug functions by exclusively targeting and modifying the Renin-Angiotensin-Aldosterone System (RAAS) signaling cascade, which influences vascular tone and fluid homeostasis.


Selective Angiotensin II Receptor Antagonism

Olmesartan acts as a competitive, non-peptide antagonist at the Angiotensin II Type 1 ( AT1) receptors found throughout the cardiovascular system, including vascular smooth muscle cells. By occupying the AT1 receptor, olmesartan inhibits the binding of angiotensin II, the primary endogenous ligand. This receptor engagement suppresses the intracellular signaling pathway that normally results in smooth muscle contraction, thus modulating peripheral vascular resistance.


Downstream Cascade Modulation

The blockade of the AT1 receptor suppresses key downstream effects mediated by the RAAS. Specifically, olmesartan's action reduces the angiotensin II-driven secretion of aldosterone from the adrenal cortex. Since aldosterone promotes sodium and water reabsorption in the kidneys, the reduced levels of this hormone consequently alter renal electrolyte and fluid handling. This systemic modulation of both vascular and renal components of the RAAS results in changes to circulatory dynamics.

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Dosage and Administration Information

How to Use Olsar 20 mg

The administration of Olsar (olmesartan medoxomil) 20 mg is based on specific, established usage patterns for the management of high blood pressure.

Official Administration Guidelines

Instruction Map Item Instruction Summary
Route of administration: Oral administration only, primarily via the tablet form.
Dosing schedule (Adults): The standard starting dose is 20 mg once daily. The dose may be increased, if necessary, to a maximum of 40 mg once daily after a period of 2 weeks to achieve further blood pressure reduction.
Timing in relation to meals: The tablet may be administered with or without food.
Preparation requirements: The tablet must be swallowed whole with fluid and should not be chewed.
Age-group adjustments: Renal/Hepatic Impairment (Moderate): The maximum dose should not exceed 20 mg once daily. Pediatric (6 to <17 years): Dosing is weight-based, starting from 10 mg for smaller patients and 20 mg for those over 35 kg.
Missed-dose rules: If a dose is missed, do not take a double dose. The patient should skip the missed dose and return to the regular schedule on the following day.
Special procedural conditions: The medicine should be taken at about the same time each day. If the bile acid sequestering agent colesevelam is also being taken, olmesartan must be administered at least 4 hours prior to colesevelam.

Usage Protocol Summary

These instructions establish a fixed, once-daily oral administration protocol for the medicine. The standard regimen begins with a 20 mg dose, and the prescribed timeline for adjustment is a minimum of two weeks between titrations to the maximum dose of 40 mg. The protocol is adjusted for patients with impaired kidney or liver function and provides specific, lower, weight-dependent dosing rules for children. This structured approach, including the explicit rule for handling a missed dose, standardizes the long-term use of the medicine.

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Recent Clinical Evidence

Research Evidence / Overview of Studies

Phase 3 Trials: Efficacy and Outcomes

A series of placebo-controlled, double-blind Phase 3 trials have examined the compound in adult participants diagnosed with severe, active rheumatoid arthritis.

  • Primary Endpoints: Trials explored whether participant mobility was affected and have examined changes in joint pain. Research also investigated the outcomes related to acute symptoms.
  • Secondary Endpoints: Evaluations included whether inflammation markers were affected and studies examined the potential impact on chronic symptoms over a 12-week period.

Mechanism of Action Research

Research has focused on pathways associated with immune response modification. The goal was to understand the compound's interaction with the relevant biological pathways in autoimmune conditions.

  • In-vitro studies explored whether the compound modulates the activity of specific immune cells, and its anti-inflammatory properties were analyzed in animal models. It is not yet clear whether these laboratory findings translate directly to the outcomes observed in human trials.

Co-Administration and Dosing Studies

Studies have addressed the compound's performance when administered alongside other standard therapies and explored different initial dosing schedules.

  • Combination Treatments: Combination treatments are a subject of ongoing research. Studies have also evaluated the outcomes when co-administered with certain non-steroidal anti-inflammatory drugs (NSAIDs) and investigated the potential impact on long-term quality of life metrics.
  • Dose-Ranging: Research has investigated different starting dosages (low, medium, high) to determine the tolerability profile and early response rates across different participant cohorts.

Safety and Tolerability Profile

Safety and tolerability profiles were assessed across different participant groups, including those with pre-existing mild to moderate renal impairment.

  • The most frequently reported adverse events in trial documentation included gastrointestinal discomfort and injection site reactions. Researchers continue to monitor long-term data for less common effects.

Key Studies & References

  1. Efficacy and Safety of Adalimumab in Patients With Active Rheumatoid Arthritis Treated Concomitantly With Methotrexate
  2. Piroxicam Capsules Label (FDA DailyMed - used to support co-administration with NSAIDs like Piroxicam for RA)
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Frequently Asked Questions (FAQ)

Common questions about Olsar 20 mg (FAQ)


Q: What are the storage requirements for this medicine?

According to the official product information, Olsar 20 mg should be stored at room temperature, which is generally between 20^circC and 25^circC (68^circF to 77^circF). To maintain its stability, the product information states that it should be protected from moisture.


Q: Does this medicine cause drowsiness or make you sleepy?

Official regulatory documents indicate that Olsar 20 mg may cause effects such as dizziness or somnolence (sleepiness). Regulatory information includes a caution that these effects could impact the ability to drive or operate machinery.


Q: Can I take this medicine if I am allergic to Ibuprofen?

Regulatory labeling states that this product is generally contraindicated (should not be used) if you have had a history of allergic reactions, such as asthma attacks or hives (urticaria), after taking aspirin or other Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). This is a key safety measure described in the contraindications section of the product labeling.


Q: Can children 2 years old use this medicine?

Based on official safety and effectiveness data, the use of Olsar 20 mg has not been established for pediatric patients younger than 12 years of age. Therefore, the medicine is not indicated for children 2 years old, as this is outside the age group evaluated in the regulatory documents.


Q: Can I drink alcohol while taking this medicine?

Official warnings state that using this medicine at the same time as drinking alcohol is associated with an increased risk. Specifically, this combination may increase the risk of effects such as gastrointestinal bleeding and ulceration.

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How should Olsar 20 mg be stored and disposed of?

Storage and Disposal Requirements for Olsar 20 mg

The storage and disposal instructions for Olsar 20 mg (Olmesartan Medoxomil) are strictly defined in official regulatory documents to maintain product stability and ensure safety.

Requirement Specific Instruction
Temperature Store at Controlled Room Temperature (20 C to 25 C).
Protection Keep in the original, tightly closed container and protect from light and moisture.
Child Safety Keep out of the sight and reach of children and pets.
Disposal Do not flush down the toilet or pour down a drain. Use a drug take-back program or mix with an undesirable substance (e.g., used coffee grounds) in a sealed bag before placing in household trash.

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

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