Olmefast CH 20mg/5mg/12.5mg Tablet

Olmefast CH 20mg/5mg/12.5mg Tablet is a prescription-grade triple-combination antihypertensive medication containing amlodipine, chlorthalidone, and olmesartan medoxomil. It is specifically indicated for the management of severe or resistant hypertension (high blood pressure) when dual-combination therapies are insufficient to reach target blood pressure goals. This medication is primarily available in oral tablet form. It should be taken as directed by a doctor.

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Written by: Syed Jommy Abbas, B. Pharma

Reviewed by: Dr. Devika Rani, MBBS

Last updated on: 03-06-2026

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Olmefast CH 20mg/5mg/12.5mg Tablet
Olmefast CH 20mg/5mg/12.5mg Tablet

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More About Olmefast CH 20mg/5mg/12.5mg Tablet

Detailed Description

Olmefast CH 20mg/5mg/12.5mg Tablet contains a blend of three distinct blood pressure-lowering agents: a calcium channel blocker (amlodipine), a thiazide-like diuretic (chlorthalidone), and an angiotensin II receptor blocker (olmesartan medoxomil). Its main therapeutic purpose is to provide a powerful, multi-mechanism approach to lowering blood pressure in patients whose hypertension is difficult to control.

By combining three different classes of medicine, Olmefast CH 20mg/5mg/12.5mg Tablet addresses high blood pressure from multiple physiological angles. It works by relaxing the smooth muscles of the blood vessels, blocking the hormones that cause vessels to tighten, and helping the kidneys remove excess salt and water from the body. This integrated action helps to significantly reduce the workload on the heart and improves overall blood flow.

In clinical practice, Olmefast CH 20mg/5mg/12.5mg Tablet is reserved for patients who have not achieved adequate blood pressure control on two other classes of antihypertensive medications. Because it combines three drugs into a single tablet, it simplifies the treatment regimen for patients with complex hypertension, which can improve adherence to the therapy.

Regular monitoring of blood pressure, kidney function, and electrolyte levels (such as potassium and sodium) is necessary while taking Olmefast CH 20mg/5mg/12.5mg Tablet. Consistent medical follow-up ensures that the medication effectively lowers blood pressure while maintaining a safe balance of minerals in the body.

Uses of Olmefast CH 20mg/5mg/12.5mg Tablet

Olmefast CH 20mg/5mg/12.5mg Tablet may be indicated by your doctor for:

Resistant Hypertension

Management of high blood pressure that remains uncontrolled despite the use of one or two types of antihypertensive drugs.

Severe Hypertension

Treatment of very high blood pressure as an initial therapy in patients who require multiple agents to reach their target range.

Cardiovascular Risk Reduction

Long-term blood pressure control to reduce the risk of secondary complications such as strokes and heart attacks.

Benefits of Olmefast CH 20mg/5mg/12.5mg Tablet

Olmefast CH 20mg/5mg/12.5mg Tablet may provide benefits such as:

  • Multi-Mechanism Control: Targets three different pathways in the body to lower blood pressure more effectively than single-agent treatments.
  • Improved Patient Adherence: Combines three medications into one pill, reducing the "pill burden" and making it easier to follow the prescribed routine.
  • Sustained Blood Pressure Lowering: Provides 24-hour coverage, helping to maintain stable blood pressure levels throughout the day and night.
  • Organ Protection: Consistent blood pressure control helps protect the heart, brain, and kidneys from the long-term damage caused by hypertension.

Side Effects of Olmefast CH 20mg/5mg/12.5mg Tablet

Common side effects of Olmefast CH 20mg/5mg/12.5mg Tablet may include
  • Peripheral Edema: Swelling of the ankles or feet due to fluid accumulation.
  • Dizziness: Feeling lightheaded, especially when standing up quickly.
  • Headache: Mild to moderate head pain as the body adjusts to lower blood pressure.
  • Fatigue: General feelings of tiredness or lethargy.
Uncommon side effects of Olmefast CH 20mg/5mg/12.5mg Tablet may include
  • Frequent Urination: Increased need to pass urine due to the diuretic component.
  • Palpitations: A sensation of a fast or irregular heartbeat.
Serious side effects that require medical attention may include
  • Kidney Dysfunction: Signs include a significant change in urine output or swelling in the legs.
  • Severe Electrolyte Imbalance: Signs include intense muscle cramps, extreme thirst, confusion, or an irregular heart rate.
  • Angioedema: Swelling of the face, lips, tongue, or throat which can cause difficulty breathing.

Consult your doctor if you experience any unusual, severe, or persistent symptoms while using Olmefast CH 20mg/5mg/12.5mg Tablet.

Directions for Use

  • Swallow Olmefast CH 20mg/5mg/12.5mg Tablet tablets whole with a glass of water; do not crush or chew them.
  • It can be taken with or without food, but taking it at the same time each day is recommended for consistency.
  • Many patients prefer taking this medication in the morning because the diuretic component may increase the need to urinate.
  • Do not stop taking this medication abruptly, even if you feel well, as your blood pressure could rise rapidly.
  • Always check your blood pressure at home as directed by your doctor and keep a record of the readings.

How it works

Olmefast CH 20mg/5mg/12.5mg Tablet works through the combined actions of its three components. Amlodipine is a calcium channel blocker that prevents calcium from entering the muscle cells of the heart and blood vessels, causing the vessels to relax and widen. Olmesartan medoxomil is an angiotensin II receptor blocker (ARB) that prevents a specific hormone from tightening the blood vessels, further aiding in relaxation and improved blood flow.

The third component, Chlorthalidone, is a thiazide-like diuretic. It works on the kidneys to promote the excretion of sodium and water into the urine. By reducing the total amount of fluid circulating in the bloodstream, it lowers the pressure against the vessel walls. Together, these three actions significantly lower systemic blood pressure more effectively than each drug could do alone.

Safety Advice for Olmefast CH 20mg/5mg/12.5mg Tablet

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Allergy
Unsafe

Olmefast CH 20mg/5mg/12.5mg Tablet should not be used in patients with known allergy to amlodipine, chlorthalidone, olmesartan, sulfonamide-derived medicines, or any ingredient in the formulation. Seek medical help if swelling, rash, or breathing difficulty occurs.

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Breastfeeding
Caution

Components of Olmefast CH 20mg/5mg/12.5mg Tablet may pass into breast milk. Use during breastfeeding should only occur if advised by a doctor after assessing benefits and risks.

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Pregnancy
Unsafe

Olmefast CH 20mg/5mg/12.5mg Tablet is not recommended during pregnancy, particularly in the second and third trimesters, as medicines affecting the renin-angiotensin system may harm the developing baby.

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Driving
Caution

Olmefast CH 20mg/5mg/12.5mg Tablet may cause dizziness, tiredness, or lightheadedness, especially when starting treatment or after dose changes. Avoid driving if these symptoms occur

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Alcohol
Caution

Alcohol may increase dizziness and blood pressure-lowering effects of Olmefast CH 20mg/5mg/12.5mg Tablet, which can increase the risk of fainting or lightheadedness.

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Liver
Caution

Patients with liver disease may require careful monitoring because amlodipine and olmesartan may have altered handling in hepatic impairment.

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Kidney
Caution

Olmefast CH 20mg/5mg/12.5mg Tablet should be used carefully in patients with kidney disease, as it may affect kidney function and electrolyte balance. Monitoring of kidney function and blood tests may be required.

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Children
Limited information

Safety and effectiveness of this fixed-dose combination in children have not been well established. Use should occur only if specifically prescribed.

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Elderly patients
Caution

Older adults may be more sensitive to low blood pressure, dehydration, electrolyte imbalance, or kidney-related side effects. Regular monitoring may be needed during treatment.

Quick Tips for Olmefast CH 20mg/5mg/12.5mg Tablet

  • Rise slowly from a sitting or lying position to minimize dizziness and the risk of falling.
  • Stay hydrated, but follow your doctor's specific advice regarding fluid and salt intake.
  • Avoid using potassium supplements or salt substitutes containing potassium unless specifically told to do so by your doctor.
  • Monitor for signs of dehydration, such as extreme thirst or very dark urine, especially during hot weather or illness.
  • Keep a log of your blood pressure readings to share with your doctor during check-ups.

Storage Advice

  • Store Olmefast CH 20mg/5mg/12.5mg Tablet as directed on the product label.
  • Keep the tablets in their original container to protect them from moisture and light.
  • Store at room temperature away from excessive heat.
  • Keep all medications out of the sight and reach of children.

Drug-Food Interaction

  • Grapefruit Juice (Caution): May increase the levels of amlodipine in your blood, potentially causing blood pressure to drop too low.
  • Salt Substitutes (Unsafe): Substitutes containing potassium can lead to severe high potassium levels when combined with olmesartan.
  • High-Salt Foods (Caution): Excessive salt intake can counteract the blood pressure-lowering effects of the medication.

Interactions with Other Drugs

  • Lithium (Unsafe): Olmefast CH 20mg/5mg/12.5mg Tablet can increase lithium levels to toxic amounts; combined use requires strict monitoring.
  • NSAIDs (e.g., Ibuprofen) (Caution): Can reduce the blood pressure-lowering effect and increase the risk of kidney problems.
  • Other Blood Pressure Meds (Caution): Combining with other antihypertensives can lead to excessively low blood pressure.
  • Potassium-Sparing Diuretics (Caution): May lead to excessively high potassium levels in the blood.

Drug-Disease Interactions

  • Kidney Disease (Caution): May worsen kidney function in certain patients; requires frequent blood tests.
  • Diabetes (Caution): Chlorthalidone may slightly affect blood sugar levels; monitor glucose closely.
  • Gout (Caution): Chlorthalidone can increase uric acid levels, potentially triggering a gout attack.
  • Electrolyte Imbalance (Unsafe): Use with extreme caution if you already have very low levels of potassium or sodium.

What If You Forget to take Olmefast CH 20mg/5mg/12.5mg Tablet?

If you miss a dose of Olmefast CH 20mg/5mg/12.5mg Tablet, take it as soon as you remember on that same day. If you do not remember until the following day, skip the missed dose and continue with your regular schedule. Do not take two doses at once to compensate for a forgotten tablet.

FAQ

Fact Box

Therapeutic Class

Cardiovascular Agent (Antihypertensive)

Action Class

Triple-combination Antihypertensive

Chemical Class

Calcium Channel Blocker (CCB), Thiazide-like Diuretic, Angiotensin II Receptor Blocker (ARB)

Habit Forming

No

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