lol at 'pickled stuff'.. your buddy is sort of on the right track. he is talking about sauerkraut however the bad news is the stuff you get from the supermarket is dead. you have to find a good quality health food store and see if they sell it
i don't recommend ever taking antibiotics though unless it is 100% necessary. 99% of the time they are needlessy prescribed and anyone who wants to argue this with me all i can tell you is there is a reason many have stopped working the past decade.