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Cardec DM (Generic Phenylephrine)

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Why is this medication prescribed?

Cardec DM is a prescription medication typically used to relieve cough caused by the common cold, bronchitis, or other respiratory tract infections. It contains three active ingredients: chlorpheniramine, an antihistamine that helps to reduce cough by blocking the effects of histamine, and dextromethorphan, a cough suppressant that works on the cough center in the brain to suppress coughing, and phenylephrine (a decongestant)

How should this medicine be used?

Cardec DM is typically taken orally, in the form of a liquid medication. Here are some general guidelines on how to use Cardec DM:

  • Follow Doctor’s Instructions: Always follow the dosage instructions provided by your doctor or pharmacist. Do not exceed the recommended dosage or take it more frequently than instructed.
  • Use the Correct Measuring Device: Measure the liquid medication with a special dose-measuring spoon or cup. Avoid using a regular household spoon, as it may not provide an accurate dosage.
  • Take with or without Food: Cardec DM can be taken with or without food. However, taking it with food may help reduce stomach upset.
  • Stay Hydrated: Drink plenty of fluids while taking Cardec DM to help loosen mucus and keep the throat moist.
  • Do Not Mix with Similar Medications: Avoid taking Cardec DM with other medications that contain similar ingredients, as this can increase the risk of overdose.
  • Store Properly: Store Cardec DM at room temperature away from light and moisture. Keep it out of reach of children and pets.
  • Do Not Stop Abruptly: If you’ve been using Cardec DM for a while, do not stop taking it abruptly without consulting your doctor, as this can lead to withdrawal symptoms.
  • Monitor for Side Effects: Pay attention to any side effects you may experience while taking Cardec DM, and report them to your doctor if they become bothersome or severe.

Always consult your healthcare provider if you have any questions or concerns about how to use Cardec DM properly.

Other uses for this medicine

While Cardec DM is primarily used to relieve symptoms associated with the common cold, allergies, and respiratory infections, it may also be prescribed for other purposes. These alternate uses should be determined by your healthcare provider based on your individual medical condition.

What special precautions should I follow?

Regarding special precautions for Cardec DM, here are some important points to keep in mind:

  • Medical History: Inform your doctor about any medical conditions you have, especially if you have a history of asthma, breathing problems, glaucoma, high blood pressure, heart disease, liver disease, kidney disease, thyroid problems, seizures, or an enlarged prostate.
  • Allergies: Let your doctor know if you have any allergies, particularly to chlorpheniramine, dextromethorphan, or any other medications.
  • Pregnancy and Breastfeeding: If you are pregnant or breastfeeding, discuss the risks and benefits of using Cardec DM with your doctor before taking it.
  • Interaction with Other Medications: Inform your doctor about all the medications you are currently taking, including prescription and over-the-counter drugs, herbal supplements, and vitamins, to avoid potential interactions.
  • Alcohol:Avoid consuming alcohol while taking Cardec DM, as it can enhance the sedative effects of the medication and increase the risk of side effects.
  • Driving and Operating Machinery: Cardec DM may cause drowsiness or dizziness. Avoid driving, operating heavy machinery, or engaging in activities that require mental alertness until you know how this medication affects you.
  • Overdose Risk: Taking more than the recommended dose of Cardec DM can lead to overdose, which can be dangerous. Follow your doctor’s instructions carefully and seek medical attention immediately if you suspect an overdose.

Always adhere to your doctor’s recommendations and ask any questions you may have about using Cardec DM safely.

What special dietary instructions should I follow?

As for special dietary instructions, there are no specific dietary restrictions associated with Cardec DM. However, it’s always a good idea to maintain a balanced diet and stay hydrated while taking any medication.

What should I do if I forget a dose?

If you forget a dose of Cardec DM, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you have any concerns or questions about missed doses, consult your doctor or pharmacist for guidance.

What side effects can this medication cause?

Cardec DM, like any medication, can potentially cause side effects. Here are some common side effects associated with its active ingredients:

  • Drowsiness: Chlorpheniramine, one of the components of Cardec DM, is known to cause drowsiness in some individuals. This effect can impair your ability to perform tasks that require alertness, such as driving or operating machinery.
  • Dizziness: Dizziness is another common side effect of chlorpheniramine. It may be particularly noticeable when standing up quickly from a sitting or lying position.
  • Dry mouth, nose, or throat: Antihistamines like chlorpheniramine can cause dryness in the mouth, nose, and throat, leading to discomfort.
  • Nausea or vomiting: Some individuals may experience gastrointestinal upset, including nausea or vomiting, when taking Cardec DM.
  • Constipation: Phenylephrine, a decongestant found in Cardec DM, can sometimes cause constipation as a side effect.
  • Headache: Headaches are reported by some individuals as a side effect of Cardec DM.
  • Nervousness or restlessness: Dextromethorphan, a cough suppressant in Cardec DM, may cause feelings of nervousness or restlessness in some people.
  • Insomnia: Dextromethorphan can also interfere with sleep in some individuals, leading to difficulty falling asleep or staying asleep.
  • Increased heart rate or palpitations: Phenylephrine may cause an increase in heart rate or palpitations in some individuals, particularly those with underlying heart conditions.
  • Allergic reactions: While rare, allergic reactions to any of the ingredients in Cardec DM can occur. Symptoms may include rash, itching, swelling, severe dizziness, or trouble breathing. Seek medical attention immediately if you experience any signs of an allergic reaction.

It’s essential to be aware of these potential side effects and to consult your healthcare provider if you experience any concerning symptoms while taking Cardec DM. Additionally, always follow the dosage instructions provided by your healthcare provider or as indicated on the medication packaging to minimize the risk of side effects.

What should I know about storage and disposal of this medication?

Storage and Disposal:


  • Store Cardec DM at room temperature away from light and moisture.
  • Keep it out of reach of children and pets, as it can be harmful if ingested accidentally.
  • Do not store it in the bathroom or near the kitchen sink, where moisture and heat can degrade the medication.


  • Dispose of Cardec DM properly according to local regulations. Do not flush it down the toilet or pour it into a drain unless instructed to do so.
  • You can check with your local pharmacy or waste disposal facility for guidance on safe medication disposal methods.

In case of emergency/overdose

  • If someone overdoses on Cardec DM or experiences severe symptoms such as difficulty breathing, seizures, or loss of consciousness, call emergency services immediately.
  • Contact a poison control center or seek medical help promptly if you suspect an overdose, even if symptoms seem mild.

What other information should I know?

  • Follow the dosage instructions provided by your healthcare provider or as indicated on the medication packaging. Do not exceed the recommended dosage.
  • Inform your healthcare provider of any other medications you are taking, as Cardec DM may interact with certain drugs.
  • Avoid consuming alcohol while taking Cardec DM, as it can increase the risk of side effects such as drowsiness and dizziness.
  • If you experience any unusual or severe side effects while taking Cardec DM, contact your healthcare provider promptly.
  • Keep track of your medication usage and refill prescriptions as needed to ensure continuous treatment.

Always consult with a healthcare professional for personalized advice and guidance regarding the use, storage, and disposal of Cardec DM or any other medication.

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