- Dexchlorpheniramine: It blocks histamine receptors in the body. Histamine is a chemical released during allergic reactions, and it causes symptoms like sneezing, itching, and a runny nose. By blocking histamine, dexchlorpheniramine helps relieve these symptoms.
- Dextromethorphan: This ingredient works by acting on the brain to suppress the urge to cough. It reduces the need to cough, especially for persistent, dry coughs that can be common with colds or flu.
- Pseudoephedrine: It works by constricting the blood vessels in the nasal passages, which reduces swelling and inflammation. This opens up the airways and helps relieve nasal congestion, making it easier to breathe.
Together, these three ingredients work in tandem to reduce symptoms related to allergies, colds, or flu, making the combination effective for treating common respiratory symptoms.
While generally safe when used as directed, this medication may cause side effects in some individuals. Common side effects include:
- Drowsiness: Since dexchlorpheniramine is an antihistamine, it can cause drowsiness. It’s important not to drive or operate machinery if you feel sleepy.
- Dry Mouth: As with many antihistamines, dexchlorpheniramine can cause a dry mouth. Drinking water frequently or chewing sugar-free gum may help relieve this symptom.
- Dizziness or Lightheadedness: Some users may experience dizziness or lightheadedness, especially when standing up quickly. Rising slowly can help reduce this feeling.
- Nausea or Stomach Upset: The medication can sometimes cause stomach discomfort or nausea. Taking it with food may help reduce these side effects.
- Increased Heart Rate: Pseudoephedrine can cause an increased heart rate or higher blood pressure, particularly in sensitive individuals.
Serious side effects are rare but can include:
- Severe Allergic Reactions: In the event of an allergic reaction, such as difficulty breathing, swelling of the face or throat, or a rash, immediate medical attention is needed.
- High Blood Pressure: Pseudoephedrine may increase blood pressure, especially in people with pre-existing hypertension.
In many places, dexchlorpheniramine, dextromethorphan, and pseudoephedrine may be available over-the-counter. However, pseudoephedrine is sometimes regulated and sold behind the counter in certain countries due to its potential use in manufacturing illicit substances. It is important to be aware of local regulations and guidelines when purchasing this medication.