the panadol is just the same in adult as it is in children. If you knew the amount of miligrams that you wanted to give and could accurately give that by breaking it in half then it isn't actually dangerous. For example the recommended dosage is 15 miligrams per kilogram. So when my DD was 14 kg I gave her 210mgs of panadol. so half of one adult tablet would be 250mg and then if you took a bit off that you would have close to the amount you want.

You are right that overdosing with panadol is very dangerous and can kill. However because of this dangerous fact, the dosage recommendations for panadol are actually much lower than what you can safely give. In some loading doses for PR panadol I have known emergency dr's to give a dose of 40mg/kg if the child has had no previous panadol for the past 24hrs. So you see there is quite a bit of leeway. I wouldn't freak out if I were you.

Having said all of that. If you don't want this person to give your baby adult panadol, then the carer should respect your parenting choices without question.

Good luck

xx Bella