Wait atleast 6 hour between 2 doses of paracetamol. If fever is high you can do tepid sponging to reduce fever.

You can give dolo 500 ( paracetamol) after another 2 hours You can give paracetamol every 4-6 hours as per guidelines You will be having dehydration due to high grade fever  Give ORS ( oral rehydration solution) or electral - prepare it in one litre of water - one packet and give as much he can drink.

Can give dolo 500 now..

Not given ..wait for 6 hours