First off, I'm a total worrier about all things health related 
My DS woke up with a really nasty cough this morning and I said to my DH (who got up with him) that once DS had finished a drink to give him 2.5mls of his cough medicine.
About three hours later I realised DH had actually given 5mls instead of 2.5mls.
DS seems fine but my friend said I should ring Poison Control as he may be toxic because of it 
My DH said I would be overreacting.
Would I be??