Babies given Calpol or other forms of paracetamol are twice as likely to develop asthma, research shows.
Those fed the medicines in the first 15 months of their life are also at much higher risk of suffering from allergies when they are older.
Researchers believe that the surge in childhood asthma in the last 50 years may be linked to increasing numbers of parents giving their children paracetamol for pain or fever relief.
A study found that babies who had Calpol or similar medicines in the first 15 months were twice as likely to have suffered wheezing and other symptoms of asthma by the time they were six.