Overdose Of Vitamin C

Is there such a thing as overdose of Vitamin C..??  The man is sick.. so am I.. caught the damn thing from him.  A friend dropped in.. and suggested an overdose of Vitamin C .. since I am diabetic.. and can’t take orange juice.  I donch know what side effects it may have.. but i sent the man to get some.. and had 2 instead of the usual 1 they recommended… and yes.. i do feel alot better.. than i did before taking the Vitamin C.  Well.. you know who is gonna be taking Vitamin C regularly now.