The alert was issued after the MHRA found that the salicylate salts contained in the gels could have the same effect on the body as aspirin, which is already contraindicated in children under 16.
The MHRA says that the move is a precautionary measure and that the advice was being introduced due to a theoretical risk that these products could cause Reye's syndrome.
Dr June Raine, director of vigilance and risk management of medicines at the MHRA, said: 'Any risk from these oral gel products is theoretical. We are not aware of any confirmed cases, but when there are alternatives available, any risk is not worth taking.
'The new advice is to stop using these products in children and young people under the age of 16, and to use alternative treatments.'
Other products are available for children under 16 including Bonjela Teething Gel, which contains a different formula.
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