Need maths help - converting dosage children's vs infant ibuprofen

[corgikelly]

I am being an idiot, but something doesn't seem right.

My 13-month-old DS gets 1.875 mls of infant ibuprofen for a fever. Am out of infant but have children's. No dosage for under 2yrs old given on the packaging.

Infant ibuprofen is 50 mg of active ingredient per 1.25 mls

Children's ibuprofen is 100 mg of active ingredient per 5 mls

That means, doesn't it, that infant is 200 mg of active ingredient per 5 mls (multiplying both by 4)? So it's twice as strong as children's?? That seems totally wrong.

But if it is right, I'd need to double DS' dose if I'm giving him the children's stuff, yes?

Help, please, for the mathematically feeble...

I'd phone NHS 24 to be sure tbh. Or nip to tesco and get the proper bottle.

You're right - you have to double the dose with the children's one. I think the infant one is more concentrated because babies are unlikely to swallow a whole spoonful, so it comes with a dropper. Just make sure you don't ever get it the other way round...

Yes, the infants one is twice as strong as the children's, so you would have to double the infants dose if you were giving the child's, so if the infant dose is 1.875 you would need to give 3.750ml of the child's.

BUT I would be very careful about checking the active ingredient are exactly the same, and TBH I would probably go and buy some more of the infants because I am uber paranoid. But then I only have a PFB so am inclined that way!

You are right although

The active ingrediants should be the same - simply ibuprofen, sweetner etc.it will say on ingredients.

To work the dose out there is a formula = what you want, divided by what youve got x by
what its in!!

Therefore 10mg = 0.25 ml (infant)
your dose 1.875 = 75mg (infant) this was harder to work out!!

What I want (75mg) divided by what I've got (100mg) times by what its in (5ml) = 3.75ml

Did this a lot in A&E for kids! Simple when you know how