A popular ingredient in cold and flu tablets, phenylephrine, has been found to have little to no effect when taken orally, despite being widely sold.Research shows it does not meaningfully relieve nasal congestion when swallowed in a tablet, unlike its nasal spray form.This ingredient replaced pseudoephedrine in Australia after the latter was restricted due to its misuse in illicit drug production.While the FDA proposed removing oral phenylephrine from over-the-counter sale in 2024, the TGA in Australia is still monitoring the situation.

Consumers may be paying for a medicine that offers minimal relief, with other ingredients like paracetamol or ibuprofen likely responsible for symptom relief.Alternatives such as nasal sprays, saline rinses, or steam inhalation are recommended for nasal congestion.The article highlights the importance of informed choices and consulting healthcare professionals for effective treatment options.