• Syrup: If you are using the syrup form of chlorpheniramine, dextromethorphan, and phenylephrine, measure the prescribed amount using a measuring spoon or cup. For adults, this is typically 5-10 mL every 4-6 hours, up to 4 doses per day.
• Tablets: If you are using the tablet form, take 1 tablet every 4-6 hours, not exceeding 6 tablets per day.

Important Tips:

• Do not exceed the recommended dose. Taking more than the prescribed amount can increase the risk of serious side effects, including overdose.
• If you miss a dose, take it as soon as you remember, unless it’s almost time for your next dose. If so, skip the missed dose and continue your regular schedule.
• Avoid alcohol while taking this medication as it can enhance the sedative effects of chlorpheniramine and dextromethorphan.

• Chlorpheniramine: Chlorpheniramine blocks histamine, a chemical released by the body during allergic reactions. Histamine binds to receptors in the body and causes symptoms like sneezing, runny nose, and itching. By blocking histamine, chlorpheniramine helps alleviate these symptoms.
• Dextromethorphan: Dextromethorphan works in the brain to suppress the cough reflex. It acts on the central nervous system to reduce the urge to cough. Unlike other types of cough medicines that may thin mucus or help expel it, dextromethorphan simply reduces the body’s response to the need to cough.
• Phenylephrine: Phenylephrine works by constricting the blood vessels in the nasal passages. This helps reduce the swelling and inflammation in the nasal tissues, making it easier for air to pass through the nose and easing the discomfort of sinus pressure and congestion.

By combining these three active ingredients, this medication addresses multiple cold and allergy symptoms at once: nasal congestion, coughing, sneezing, and a runny nose.

While Chlorpheniramine, Dextromethorphan, and Phenylephrine is generally safe when used as directed, it can cause side effects. Common side effects include:

• Drowsiness: Chlorpheniramine and dextromethorphan can cause drowsiness. This may be beneficial for nighttime use but can impair daytime activities such as driving or operating machinery.
• Dizziness or Lightheadedness: Some users may feel dizzy or lightheaded, especially when standing up quickly.
• Dry Mouth: Chlorpheniramine can cause a dry mouth or throat, which may be uncomfortable.
• Nausea or Vomiting: Dextromethorphan may cause stomach discomfort or nausea, especially at higher doses.
• Increased Blood Pressure: Phenylephrine can raise blood pressure, which may be a concern for people with high blood pressure or heart disease.

Serious side effects may include:

• Severe Allergic Reactions: Signs of a serious allergic reaction, such as difficulty breathing, rash, or swelling of the face and throat, require immediate medical attention.
• Rapid Heart Rate: Phenylephrine can cause an increased heart rate or palpitations, which should be reported to a healthcare provider immediately.
• Respiratory Depression: In rare cases, dextromethorphan, when used in excess, can cause slowed breathing. Seek medical help if you experience any difficulty breathing.

Before using Chlorpheniramine, Dextromethorphan, and Phenylephrine, there are several important warnings and precautions to consider:

• Pregnancy and Breastfeeding: Chlorpheniramine and dextromethorphan should only be used during pregnancy if the benefits outweigh the risks. Both medications pass into breast milk, so breastfeeding mothers should consult a healthcare provider before using this combination.
• High Blood Pressure: Since phenylephrine can raise blood pressure, people with high blood pressure, heart disease, or circulatory problems should consult their doctor before using this medication.
• Liver or Kidney Disease: People with liver or kidney conditions may need dose adjustments and should use this combination with caution.
• Alcohol Use: Alcohol can increase the sedative effects of chlorpheniramine and dextromethorphan, so it is important to avoid alcohol while using this medication.
• Driving and Operating Machinery: Because of the drowsiness caused by chlorpheniramine and dextromethorphan, avoid activities requiring alertness, such as driving or operating heavy machinery.

Chlorpheniramine, dextromethorphan, and phenylephrine may interact with several other medications, including:

• Other Antihistamines: Using additional antihistamines with chlorpheniramine can enhance sedative effects, leading to excessive drowsiness or dizziness.
• Other Cough Suppressants: Combining dextromethorphan with other cough suppressants can increase the risk of side effects like excessive sedation or respiratory depression.
• Monoamine Oxidase Inhibitors (MAOIs): MAOIs (used to treat depression) can cause severe interactions with dextromethorphan, leading to dangerously high blood pressure or other severe reactions.
• Blood Pressure Medications: Phenylephrine can increase blood pressure, so it is important to consult a healthcare provider before using this combination if you are taking medications for high blood pressure.

Always inform your healthcare provider of any medications you are currently taking to avoid harmful interactions.

For Chlorpheniramine, Dextromethorphan, and Phenylephrine, the typical dosage for adults is:

• Syrup: 5-10 mL every 4-6 hours, up to 4 doses per day.
• Tablets: 1 tablet every 4-6 hours, not exceeding 6 tablets per day.

Always follow the instructions provided by your healthcare provider or the product label.

Chlorpheniramine, dextromethorphan, and phenylephrine are often available over-the-counter, but in some countries, certain formulations may require a prescription. Always check with your healthcare provider or pharmacist to ensure that this medication is appropriate for your symptoms and health status.

1. What is Chlorpheniramine?
   An antihistamine used to relieve allergy symptoms.

2. What is Dextromethorphan used for?
   A cough suppressant to relieve cough.

3. What is Phenylephrine?
   A decongestant that reduces nasal swelling.

4. What are common brand names for these combined drugs?
   Common brands: Theraflu, Coricidin, Dimetapp.

5. Which drug class do these medications belong to?
   Drug classes: Antihistamine (Chlorpheniramine), Antitussive (Dextromethorphan), Decongestant (Phenylephrine).

6. Are these drugs controlled substances?
   Controlled substance classification: No, generally not controlled.

7. Are these drugs available as generics?
   Generic status: Yes, all are available in generic forms.

8. Where can I buy these medications?
   Availability: Over-the-counter (OTC) in pharmacies and drugstores.

9. Can these drugs cause drowsiness?
   Yes, Chlorpheniramine can cause drowsiness.

10. Is it safe to use these drugs during pregnancy?
    Consult a healthcare provider before use during pregnancy.

11. Can I drive after taking these medications?
    Use caution; drowsiness and dizziness may impair driving.

12. Do these drugs interact with other medicines?
    Yes, especially with sedatives, MAO inhibitors, and antidepressants.

13. What are common side effects?
    Side effects include drowsiness, dry mouth, dizziness, and increased heart rate.

14. How long do effects last?
    Typically 4-6 hours depending on the formulation.

15. Can children use these drugs?
    Some formulations are for children; always check age restrictions.

16. Are there alcohol restrictions while taking these?
    Avoid alcohol as it may increase drowsiness and side effects.

17. Can phenylephrine raise blood pressure?
    Yes, it can increase blood pressure in sensitive individuals.

18. How should I store these medications?
    Store at room temperature away from moisture and heat.

19. Are these drugs safe for people with hypertension?
    Consult a doctor; phenylephrine may not be recommended.

20. How quickly do these medicines start working?
    Usually within 15-30 minutes after oral intake.