Any side effects to my baby boy I have given more than the dose; of 0.5 ml of zincovit drops

I don't think so if given once or twice. If the baby is active and playing don't worry

Hi , in case you have given more (how much more?) Medication to your baby pls check with your Dr. Your Dr will advise on the way forward.

How much have you given. You can talk to the doctor once to be on the safe side.