It's not usually recommended for children to take co-codamol that's been bought from a pharmacy for longer than 3 days. If your child needs to take co-codamol for a long time their body can become tolerant to it. That means they may need higher doses to control their pain. If your child has been taking co-codamol for a long time, you can prevent withdrawal symptoms by reducing their co-codamol gradually. Your doctor can help you do this.