A pharmacist has warned people with colds and against taking a popular remedy before bed due to risks of insomnia.In a clip shared with his 300,000 followers, Dr Ethan Melillo, a pharmacist from , said the decongestant pseudoephedrine can cause trouble sleeping.This is because the ingredient can affect cells in the brain that are responsible for the jittery feeling associated with the 'fight or flight' phenomenon that keeps us safe when we're under threat.
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