Hi temperature in toddler please help?

hiya... i am looking after my friends little boy for the night hes 3 yrs and his temperature is 38.1 he feels very hot too the touch also he was saying he felt sick b4 bed but never mentioned it since hes only wearing shorts and t-shirt pjs and i have no calpol to give him what should i do its 02:29 am so i don't want to wake his mum unless needed