At least seven people have reported serious side effects of children's medicine after one mother took to Facebook to voice her concerns.

Alison Smith's four-month-old son Jensen was rushed to hospital last month after taking 2.5ml of Galpharm's Junior Ibuprofen and losing consciousness.

He was brought around by medical staff at Maidstone Hospital after 45 minutes and Miss Smith, of Wouldham, immediately reported the incident to Tesco — where she had bought the product — and the producer Galpharm.

Tesco immediately removed the batch — which includes 80,000 bottles — from its shelves while Galpharm conducted tests on the product and concluded it was completely safe. The product is now back on sale.

However, more than four weeks on the 36-year-old mother-of-three is still waiting for the full results to be sent to her and she took to social media to hit out at the pharmaceutical company, which is owned by Perrigo.

The post has so far been shared more than 27,000 times with numerous parents speaking out about similar experiences.

The Medicines and Healthcare products Regulatory Agency (MHRA) was contacted seven times over the weekend regarding the product.

An MHRA spokesman said: "As of yesterday, we have received seven reports over the weekend of Galpharm Junior Ibuprofen Suspension use associated with a burning or tingling sensation and we are now following these up as a matter of priority.

“Parents who have given this to their children should not be concerned as there is currently no evidence that this product on the UK market is unsafe. Anyone who has any questions or concerns should speak to a healthcare professional.

“We encourage anyone who suspects a side effect as a result of taking this medicine to report it to us via the Yellow Card scheme.

“When reports are received it is not necessarily proof of a side effect occurring, but merely a suspicion by the reporter that the medicine may have caused a side effect. Reports may also include coincidental medical events that would have occurred anyway in the absence of treatment. All medicines have the potential for side effects and no effective medicine is without risk.”

The MHRA added reports are still coming in today.