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  3. CARDULES RETARD 20MG CAPSULE

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CARDULES RETARD 20MG CAPSULE, Pack of 10 CAPSULES
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Written By Bayyarapu Mahesh Kumar , M Pharmacy
Reviewed By Dr Aneela Siddabathuni , MPharma., PhD

CARDULES RETARD 20MG CAPSULE is used to treat high blood pressure (hypertension). It is also used to reduce strokes and chest pain (angina) caused by the blockage of the arteries. In addition to this, it is also used to treat preterm labour. It contains Nifedipine, which works by relaxing the blood vessels; this lowers your blood pressure and reduces your risk of stroke, heart attack, other heart problems, or kidney problems in the future. It may cause common side effects, such as low blood pressure, headache, slow heartbeat, dizziness, and rash, in some cases. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.

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Composition :

NIFEDIPINE-20MG

Manufacturer/Marketer :

Nicholas Piramal India Ltd

Consume Type :

ORAL

Return Policy :

Not Returnable

Expires on or after :

About CARDULES RETARD 20MG CAPSULE

CARDULES RETARD 20MG CAPSULE is primarily used to treat high blood pressure (hypertension). Hypertension is a condition where high blood pressure can cause health problems like heart disease.

CARDULES RETARD 20MG CAPSULE works by relaxing blood vessels, which lowers blood pressure and helps reduce the risk of stroke, heart attack, other heart issues, or kidney problems.

You may experience common side effects like low blood pressure, headache, slow heartbeat, dizziness, and rash in some cases. Most of these side effects do not require medical attention. However, talk to your doctor if you experience these side effects persistently.

Let your doctor know if you have any liver or heart problems. Inform your doctor before taking CARDULES RETARD 20MG CAPSULE if you are pregnant or breastfeeding. Additionally, a healthy diet and regular exercise are essential for maintaining blood pressure control.

Uses of CARDULES RETARD 20MG CAPSULE

CARDULES RETARD 20MG CAPSULE is used in the treatment of Hypertension (high blood pressure). The detailed uses of CARDULES RETARD 20MG CAPSULE are as follows:

  • Hypertension (High Blood Pressure): CARDULES RETARD 20MG CAPSULE effectively lowers blood pressure by relaxing blood vessels and improving blood flow.
  • Angina Treatment: CARDULES RETARD 20MG CAPSULE helps to manage chest pain (angina) by increasing blood supply to the heart muscle.
  • Cardiovascular Protection: CARDULES RETARD 20MG CAPSULE reduces the risk of cardiovascular events by controlling high blood pressure and alleviating strain on the heart.

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Directions for Use

  • CARDULES RETARD 20MG CAPSULE can be taken with or without food. However, avoid taking it with grapefruit or grapefruit juice, as this may increase the risk of side effects.
  • Follow your doctor's instructions on the dosage and timing of this medication to ensure safe and effective use.
  • Swallow CARDULES RETARD 20MG CAPSULE as a whole with a glass of water.
  • Do not crush or chew this medication.

Medicinal Benefits

  • CARDULES RETARD 20MG CAPSULE works by relaxing the blood vessels; this lowers your blood pressure and reduces your risk of having a stroke, a heart attack, heart-related chest pain (angina), other heart problems, or kidney problems in the future.
  • This medicine must be taken regularly to be effective and achieve the best results.
  • CARDULES RETARD 20MG CAPSULE is also used to treat preterm labour.

How CARDULES RETARD 20MG CAPSULE Works

CARDULES RETARD 20MG CAPSULE works by relaxing the blood vessels; this lowers your blood pressure and reduces your risk of having a stroke, a heart attack, other heart problems, or kidney problems in the future. This medicine must be taken regularly to be effective and achieve the best results.

Storage

• Store in a cool and dry place away from sunlight. • Keep out of sight and reach of children. • Non cold chain - To be stored in cool places at 10ºC to 25ºC or below 30ºC.

What if I have taken an overdose of CARDULES RETARD 20MG CAPSULE

Do not take more than the prescribed dose of CARDULES RETARD 20MG CAPSULE as it may cause serious side effects resulting in too low blood pressure, causing dizziness, especially on standing, and a fast or slow heartbeat. Other symptoms of overdose include an increase in blood sugar level, an increase in the acidity of blood, low blood oxygen levels, swelling in the lungs, and disturbances in consciousness, possibly leading to unconsciousness. If you suspect you have taken an overdose, seek immediate medical attention.

Drug Warnings

  • CARDULES RETARD 20MG CAPSULE should be taken with caution in patients with chest pain (angina), congestive heart failure, liver/kidney disease, hypotension (low blood pressure), peripheral oedema (swelling of hands/legs), and diabetes.
  • You should monitor your blood pressure regularly to make sure the CARDULES RETARD 20MG CAPSULE is working efficiently.
  • Besides, this prolonged intake of CARDULES RETARD 20MG CAPSULE can lower blood pressure (hypotension). So, daily monitoring of blood pressure is advisable.

Drug-Drug Interactions

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NifedipineCarbamazepine
Critical
NifedipineRifampicin
Severe

Drug-Drug Interactions

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NifedipineCarbamazepine
Critical
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Cardules Retard 20mg Capsule with Carbamazepine can reduce the blood levels of Cardules Retard 20mg Capsule, which may make the medication less effective.

How to manage the interaction:
Taking Cardules Retard 20mg Capsule with Carbamazepine together is generally avoided as it can possibly result in an interaction, it can be taken if your doctor has advised it. However, if you experience any unusual symptoms contact a doctor immediately. Do not stop using any medications without talking to a doctor.
NifedipineRifampicin
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Cardules Retard 20mg Capsule with rifampicin can decrease the blood levels of Cardules Retard 20mg Capsule, which may make the medication less effective.

How to manage the interaction:
Although there is an interaction between Cardules Retard 20mg Capsule and rifampicin, they can be taken together if prescribed by a doctor. However, if you experience any unusual symptoms, contact your doctor immediately. Do not discontinue any medications without consulting a doctor.
NifedipineDolasetron
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Using Dolasetron together with Cardules Retard 20mg Capsule can increase the risk of an irregular heart rhythm that may be serious.

How to manage the interaction:
Co-administration of Cardules Retard 20mg Capsule with Dolasetron can result in an interaction, but it can be taken if your doctor has advised it. If you experience symptoms like an irregular heart rhythm, sudden dizziness, lightheadedness, fainting, or irregular heartbeat, it's important to call a doctor right away. Do not stop using any medications without a doctor's advice.
NifedipineItraconazole
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Cardules Retard 20mg Capsule's blood levels can rise when itraconazole and Cardules Retard 20mg Capsule are taken together.

How to manage the interaction:
Cardules Retard 20mg Capsule and itraconazole may interact, but if a doctor prescribes them, you can still use them. If you develop dizziness or fainting, unexpected swelling of the hands, ankles, or feet, chest pain, or difficulty breathing, consult a doctor. Never discontinue taking a medication without consulting a doctor.
NifedipineTizanidine
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Cardules Retard 20mg Capsule with Tizanidine can increase the risk and severity of side effects like low blood pressure.

How to manage the interaction:
Taking Cardules Retard 20mg Capsule with Tizanidine together can result in an interaction, but it can be taken if your doctor has advised it. However, you should contact a doctor immediately if you notice any symptoms of headaches, irritation, confusion, dizziness, oedema, fatigue, palpitations, sweating, irregular heartbeats, or constipation. Do not stop using any medications without talking to a doctor.
NifedipineMorphine
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Cardules Retard 20mg Capsule and Morphine may increase the blood levels and side effects of Morphine.

How to manage the interaction:
Co-administration of Morphine with Cardules Retard 20mg Capsule can result in an interaction, but it can be taken if a doctor has advised it. However, if you experience any symptoms like trouble breathing, feeling tired, or having a cough, dizziness, drowsiness, difficulty concentrating, impaired judgment, reaction speed, and motor coordination, make sure to contact a doctor immediately. Do not stop using any medications without consulting a doctor.
NifedipineRifabutin
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Cardules Retard 20mg Capsule with Rifabutin may significantly reduces the blood levels of Cardules Retard 20mg Capsule which may make the medication less effective.

How to manage the interaction:
Taking Cardules Retard 20mg Capsule with Rifabutin together is usually avoided as it can result in an interaction, it can be taken if your doctor has advised it. However, if you experience any unusual symptoms contact a doctor immediately. Do not discontinue any medications without consulting a doctor.
NifedipinePhenytoin
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Phenytoin and Cardules Retard 20mg Capsule may decrease the blood levels of Cardules Retard 20mg Capsule, which may make Cardules Retard 20mg Capsule less effective.

How to manage the interaction:
Taking Cardules Retard 20mg Capsule with Phenytoin together can result in an interaction, it can be taken if your doctor has advised it. However, if you notice headache, fatigue, palpitations, shortness of breath, edema, or constipation, you should contact a doctor immediately. Do not stop using any medications without consulting a doctor.
NifedipinePrimidone
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
Coadministration of Cardules Retard 20mg Capsule with primidone may decrease the blood levels of Cardules Retard 20mg Capsule and reduce its effectiveness.

How to manage the interaction:
Taking Cardules Retard 20mg Capsule with Primidone together can result in an interaction, it can be taken if your doctor has advised it. However, if you experience any unusual symptoms, contact a doctor immediately. Do not discontinue any medications without consulting a doctor.
NifedipineFosphenytoin
Severe
How does the drug interact with Cardules Retard 20mg Capsule:
When Fosphenytoin is taken with Cardules Retard 20mg Capsule, the amount of Fosphenytoin in the blood can be reduced.

How to manage the interaction:
Co-administration of Fosphenytoin with Cardules Retard 20mg Capsule can result in an interaction, but it can be taken if your doctor has advised it. If you notice any symptoms like sweating, dizziness, confusion, drowsiness, sweating, chest pain or tightness, palpitations, headache, nausea, or vomiting, make sure to contact a doctor right away. Do not stop using any medications without a doctor's advice.

Drug-Food Interactions

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No Drug - Food interactions found in our database. Some may be unknown. Consult your doctor for what to avoid during medication.

Drug-Food Interactions

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Diet & Lifestyle Advise

  • Weight loss is an effective lifestyle change for controlling blood pressure. Losing even a small amount of weight can be very helpful in lowering blood pressure.
  • Include a healthier diet like whole grains, fruits, and low-fat dairy products in your diet, as it will effectively help lower blood pressure. Also, prefer eating home-cooked food and avoiding eating junk and outside food.
  • Do not eat grapefruit or drink grapefruit juice while you're taking nifedipine. It can make side effects worse.
  • Even a small reduction in sodium in your diet helps improve your heart's health and reduce blood pressure.
  • Regularly monitor your blood pressure as it can fluctuate and can lead to serious, life-threatening effects.
  • Avoid the intake of alcoholic beverages with CARDULES RETARD 20MG CAPSULE as it can make you dehydrated and affect your sleep. Drinking more amount of alcohol can actually raise blood pressure and affect the efficacy of CARDULES RETARD 20MG CAPSULE.

Habit Forming

No

Therapeutic Class

ANTI- HYPERTENSIVES

All Substitutes & Brand Comparisons

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Alcohol

Unsafe

Alcohol consumption may increase the occurrence of unpleasant side effects.

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Pregnancy

Consult your doctor

If you are pregnant, think you may be pregnant, or plan to have a baby, consult your doctor for advice before taking this medicine. You may be able to use CARDULES RETARD 20MG CAPSULE, but only after special consideration by your doctor.

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Breast Feeding

Caution

Please do not take CARDULES RETARD 20MG CAPSULE without a doctor's advice, as it may pass through the breast milk.

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Driving

Caution

CARDULES RETARD 20MG CAPSULE may cause side effects like dizziness, which could affect your ability to drive. Hence, drive or operate machinery only when you are alert.

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Liver

Consult your doctor

There is limited information available on the use of CARDULES RETARD 20MG CAPSULE in patients with liver disease. Please consult your doctor.

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Kidney

Consult your doctor

CARDULES RETARD 20MG CAPSULE is probably safe to use in patients with kidney disease. Limited data available suggest that dose adjustment may not be needed in these patients. Please consult your doctor.

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Children

Unsafe

The safety and effectiveness of CARDULES RETARD 20MG CAPSULE have not been established in children due to limited testing of this drug on children by competent authorities worldwide.

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Heart

CARDULES RETARD 20MG CAPSULE is often prescribed to patients with heart problems to treat hypertension. However, it must be taken strictly under medical supervision

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Geriatrics

Caution

CARDULES RETARD 20MG CAPSULE should be taken with caution in geriatric patients. Please consult your doctor before using CARDULES RETARD 20MG CAPSULE.

FAQs

CARDULES RETARD 20MG CAPSULE is used to treat high blood pressure (hypertension). It works by relaxing the blood vessels; this lowers your blood pressure and reduces your risk of having a stroke, a heart attack, other heart problems, or kidney problems in the future.

Yes, CARDULES RETARD 20MG CAPSULE can cause a sudden drop in blood pressure, especially when you start taking CARDULES RETARD 20MG CAPSULE. To avoid a sudden drop, please get up gently when sitting down so as to avoid dizziness.

It is advised to continue your medicine even after your blood pressure is under control or becomes normal, as blood pressure can shoot up at any time. If you have a persistent headache, please consult your doctor immediately.

If you miss a dose of CARDULES RETARD 20MG CAPSULE, you are advised to take it as soon as you remember. However, if it's time for you to take your next dose, you should skip the missed one and continue your scheduled dose. Taking both doses together can lead to very low blood pressure; hence, avoid a double dose.

No, it is a prescription drug administered by a physician to prevent specific medical conditions. Taking it on your own can cause unwanted side effects.

If you forget to take CARDULES RETARD 20MG CAPSULE at any time, take it as soon as you remember, then continue to take it at the usual times. Do not take a double dose to make up for a forgotten dose.

CARDULES RETARD 20MG CAPSULE, if stopped abruptly, may lead to withdrawal symptoms. Before stopping CARDULES RETARD 20MG CAPSULE, consult your doctor; your dose will be lowered gradually to avoid any unpleasant side effects of CARDULES RETARD 20MG CAPSULE.

Yes, in some cases, CARDULES RETARD 20MG CAPSULE may cause headaches. Headaches should usually go away after the first week of taking nifedipine. Talk to your doctor if they last longer than a week or are severe.

CARDULES RETARD 20MG CAPSULE belongs to a group of medications called Calcium channel blockers or calcium antagonists. However, research reports that nifedipine has an apparent diuretic and natriuretic effect on healthy volunteers.

CARDULES RETARD 20MG CAPSULE is generally safe to take for a long time. In fact, it works best when taken for a long time. If you experience any adverse events, consult a doctor immediately.

In rare cases, CARDULES RETARD 20MG CAPSULE can lead to Acute Kidney Injury (AKI) by causing deleterious kidney hemodynamic alterations.

A very rare but known adverse effect of CARDULES RETARD 20MG CAPSULE is drug-induced liver injury. Seek medical attention if you experience any difficulty while using CARDULES RETARD 20MG CAPSULE.

Nifedipine may impair insulin secretion at high glucose levels in patients with non-insulin-dependent mellitus. Seek medical attention if you experience any symptoms.

If you are pregnant, think you may be pregnant, or plan to have a baby, ask your doctor for advice before taking this medicine. You may be able to use CARDULES RETARD 20MG CAPSULE, but only after special consideration by your doctor.

Nifedipine passes into breast milk in very small amounts and has not been known to cause side effects in breastfed babies. If you notice that your baby is not feeding as regularly, or if you have any other concerns, talk to your doctor.

In some cases, CARDULES RETARD 20MG CAPSULE may cause palpitations. Typically, these do not require medical attention and usually resolve gradually over time. However, if these are persistent, contact your doctor.

Maintaining a healthy lifestyle is essential to reap the benefits of CARDULES RETARD 20MG CAPSULE. Eat a balanced diet, exercise regularly, manage stress, and limit alcohol and smoking. Following these tips can help control your blood pressure and improve your overall health.

Key lifestyle changes, such as quitting smoking, limiting alcohol intake, eating well, regular exercise, and minimising stress, can boost heart health and reduce the occurrence of stroke and angina.

CARDULES RETARD 20MG CAPSULE should not be discontinued without a doctor's consultation, as stopping CARDULES RETARD 20MG CAPSULE may cause blood pressure to return to pre-treatment levels within a few days. Therefore, continue taking CARDULES RETARD 20MG CAPSULE even if you feel well. Consult the doctor if you have any concerns.

If you miss a prescription dose, take it as soon as you recall and resume your regular routine. If you are near the next dose, skip the missed dose and resume your regular schedule. Do not take a double dose to make up for a forgotten dose.

It depends on your individual medical condition and response to the medication. Your doctor will determine the appropriate duration of treatment based on your specific needs.

Common side effects of CARDULES RETARD 20MG CAPSULE may include low blood pressure, headache, slow heartbeat, dizziness, and rash in some cases. Most of these side effects of CARDULES RETARD 20MG CAPSULE do not require medical attention and gradually resolve over time. However, if the side effects persist, contact your doctor.

Country of origin

India

Manufacturer/Marketer address

401, LSC, C-Block, Mohan Place Saraswati Vihar Delhi DL 110034 In
Other Info - CAR0006

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Author Details

Bayyarapu Mahesh KumarDoctor badge

Written By

Bayyarapu Mahesh Kumar

M Pharmacy

Dr Aneela SiddabathuniDoctor badge

Reviewed By

Dr Aneela Siddabathuni

MPharma., PhD

Last Updated

Nov 18, 2025 | 7:35 AM IST

Doctor imageWe provide you with authentic, trustworthy and relevant information

Reference

  1. https://www.nhs.uk/medicines/nifedipine/
  2. https://medlineplus.gov/druginfo/meds/a684028.html
  3. https://www.medicines.org.uk/emc/files/pil.655.pdf

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