Sudafed, Nurofen cold & flu and Day Nurse could all be banned or become prescription only as medical regulators investigate links to two extremely rare but deadly brain disorders.
Officials are said to be reviewing evidence to see if the rules on selling the drug pseudoephedrine need to change.
Any changes would effect decongestants like Benylin, Nurofen cold & flu and Day Nurse - some of the most common cold medicines used by Brits.