Dear Doctor, I Was Told To Give Calshine P Drops

Dear doctor, I was told to give calshine p drops to my baby.He is 3 months old. The dosage specified was 0.5 ml once per day. But Today morning I gave his 0.5 ml, and my mom gave him another 0.5 ml as she dint know that I had already given him his dose. So now i am worried whether the extra dose will be harmful for him. Please reply.