Sudafed dry coughs with congestion liquid (previously called Sudafed non-drowsy linctus) contains two active ingredients, dextromethorphan and pseudoephedrine.
Dextromethorphan is a type of medicine called a cough suppressant. It is used to suppress a dry, tickly, unproductive cough.
Coughing is a reflex response to irritation of the airways. It is useful for clearing mucus, dust and other particles from the throat and lungs. It is important because it reduces the amount of mucus, dust and bacteria in the airways that would otherwise make breathing difficult. However, sometimes, coughing can become overstimulated even when there is no mucus to clear from the lungs or throat. In this situation coughing serves no purpose and can become painful and frustrating.
Dextromethorphan is used to block the cough reflex in situations where the cough serves no purpose, ie when no plegm is being coughed up. It works by reducing the nerve signals sent from a part of the brain called the coughing centre to the muscles that produce coughing.
Pseudoephedrine is a type of medicine called a decongestant. It works by acting on alpha receptors that are found in the walls of blood vessels in the linings of the nasal passages and sinuses. It causes these blood vessels to contract and narrow, thereby decreasing blood flow into the linings of the nose and sinuses. This reduces the feeling of congestion and also reduces the production of mucus.
Pseudoephedrine also has a weak effect on receptors in the lungs called beta 2 receptors. By acting on these receptors it causes the muscles in the airways to relax. This allows the airways to open, making breathing easier.
The combination of dextromethorphan and pseudoephedrine in this medicine is useful for relieving dry, tickly, unproductive coughs with associated nasal or sinus congestion.
This medicine should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy. If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.
Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.
Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Just because a side effect is stated here does not mean that all people using this medicine will experience that or any side effect.
The side effects listed above may not include all of the side effects reported by the medicine's manufacturer. For more information about any other possible risks associated with this medicine, please read the information provided with the medicine or consult your doctor or pharmacist.
If you are already taking any medicines, including those bought without a prescription and herbal medicines, it is important to check with your doctor or pharmacist before using this medicine. Similarly, check with your doctor or pharmacist before using any new medicines while taking this one, to make sure that the combination is safe.
You should not use other decongestant medicines in combination with this one. Other cough, cold and flu remedies and painkillers may contain these ingredients so always check with your pharmacist before using other medicines in combination with this one.
You should not use this medicine if you are currently taking a type of medicine called a monoamine oxidase inhibitor (MAOI), or have taken one of these medicines in the last 14 days. MAOIs include the antidepressants phenelzine, tranylcypromine, isocarboxazid and moclobemide, and the anti-Parkinson's medicines selegiline and rasagiline. This is because the combination of pseudoephedrine with these medicines could cause a dangerous increase in blood pressure (hypertensive crisis).
If pseudoephedrine is taken with any of the following medicines, the combination may cause an increase in blood pressure. If you are already taking any of these medicines you should avoid taking this one as well:
Pseudoephedrine may reduce the effects of medicines to treat high blood pressure (antihypertensives). If you are taking medicines for high blood pressure you should not take this medicine.
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