Cilnidipine 10 mg + Olmesartan 40 mg is an oral medicine belonging to the category of antihypertensive drugs (blood pressure–lowering medicines) and is used to treat hypertension (high blood pressure). 

1. Take this medicine exactly as prescribed by your doctor, at the same time each day. 
2. Do not stop taking this medicine without your doctor’s approval, even if you feel better. 
3. If you forget to take this medicine, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose. 

More Common

1. Dizziness (especially when standing up suddenly) 
2. Headache 
3. Swelling of ankles or feet 
4. Fatigue (feeling tired) 
5. Flushing     

Less common 

1. Very low blood pressure (fainting or severe weakness) 
2. High potassium levels (muscle weakness, irregular heartbeat) 
3. Kidney problems  

Cilnidipine 10 mg + Olmesartan 40 mg works by relaxing and widening the blood vessels so that blood can flow more easily. Cilnidipine helps relax the blood vessel muscles, while Olmesartan blocks a substance in the body that normally makes blood vessels tight. When blood vessels are relaxed, the pressure inside them reduces, which helps control high blood pressure and protects the heart and kidneys. 

Allergy/Hypercreativity

If you are allergic to this medicine or any ingredient in the medicine, you should avoid it because it can cause severe allergic reactions like rash, swelling, or breathing problems.

Pregnancy

If you are pregnant or planning to become pregnant, tell your doctor. This medicine is not recommended during pregnancy because it may harm the fetus.

Severe Kidney Disease

If you have serious kidney problems, inform your doctor. This medicine can affect kidney function and may worsen your condition.

Severe Liver Disease

If you have serious liver problems, tell your doctor. The medicine is processed in the liver, and if the liver is weak, it can build up in the body and increase the risk of side effects.

Very Low Blood Pressure

If you already have low blood pressure, inform your doctor. This medicine may lower it further and cause dizziness or fainting. 

High Potassium Levels

If you have high potassium levels, tell your doctor. This medicine may increase potassium further and lead to heart rhythm problems.

Avoid taking Cilnidipine + Olmesartan with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:

Cilnidipine 10 mg + Olmesartan 40 mg can be taken with or without food. Avoid excessive alcohol, as it may cause too much lowering of blood pressure and lead to dizziness. Also, limit very high potassium foods (like bananas, coconut water, and salt substitutes) because this medicine can increase potassium levels in the body. 

1. The medicine should be stored at room temperature.  
2. Keep away from sunlight and moisture.
3. Keep away from the reach of children. 

IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name

Cilnidipine: 3-O-(2-methoxyethyl) 5-O-[(E)-3-phenylprop-2-enyl] 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 

Olmesartan: 5-(2-hydroxypropan-2-yl)-2-propyl-3-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]imidazole-4-carboxylic acid 

Daily Dose

Take Cilnidipine + Olmesartan exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.

Missed Dose

If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.

Overdose

It is not recommended to take more than the prescribed dose of Cilnidipine 10 mg + Olmesartan 40 mg per day. Overdose may cause a severe drop in blood pressure, leading to dizziness, fainting, weakness, or irregular heartbeat. Seek medical help immediately in case of overdose.

Cilnidipine 10 mg + Olmesartan 40 mg is a combination medicine used to treat high blood pressure. Cilnidipine relaxes the blood vessels, while olmesartan blocks a substance that tightens them, helping to lower blood pressure effectively and reduce the risk of heart attack, stroke, and kidney damage. Common side effects include dizziness, headache, ankle swelling, and tiredness. It should be avoided in pregnancy, severe liver or kidney disease, very low blood pressure, or high potassium levels.  

The medicine can be taken with or without food, but alcohol and excessive potassium-rich foods should be limited. It is not recommended to take more than the prescribed dose, as overdose may cause a severe drop in blood pressure and require immediate medical attention. 

What are the uses of Cilnidipine? 

Cilnidipine is used to treat hypertension (high blood pressure). It helps lower blood pressure and reduces the risk of heart attack, stroke, and kidney damage. 

What are the side effects of Cilnidipine? 

Common side effects include dizziness, headache, flushing (warmth of face), swelling of ankles or feet, and fatigue. Rarely, it may cause very low blood pressure or fast heartbeat. 

What is the mechanism of action of Cilnidipine? 

Cilnidipine works by blocking calcium channels in the blood vessel muscles. This relaxes and widens the blood vessels, allowing blood to flow more easily and lowering blood pressure. 

What is the half-life of Cilnidipine? 

The half-life of cilnidipine is approximately 2 to 5 hours, meaning it takes about this time for half of the drug to be eliminated from the body. 

What are the uses of Olmesartan tablets? 

 Olmesartan is used to treat hypertension (high blood pressure). It helps lower blood pressure and reduces the risk of heart attack, stroke, and kidney problems. 

What are the side effects of Olmesartan? 

Common side effects include dizziness, headache, diarrhea, and tiredness. In some cases, it may cause low blood pressure, high potassium levels, or kidney problems. 

What is the drug class of Olmesartan? 

Olmesartan belongs to the class of Angiotensin II Receptor Blockers (ARBs), which help relax blood vessels and lower blood pressure. 

1. PubChem. Cilnidipine [Internet]. Nih.gov. PubChem; 2024. Available from 
2. PubChem. Olmesartan [Internet]. Nih.gov. PubChem; 2025. Available from 
3. Cilnidipine [Internet]. go.drugbank.com. Available from 
4. Olmesartan [Internet]. go.drugbank.com. Available from 
5. Olmesartan [Internet]. Drugs.com. Drugs.com; 2019. Available from