Is taking chicken grown with antibiotic is safe?

Not if raw. The main problem with all the antibiotics used, is that there is development of germs that can live in those antibiotics (resistance). Following cooking guidelines kills all the germs.
We don't know. What the long term effects will be, as many different factors may contribute particular based on how frequent and how long you have been consuming chicken treated with antibiotics. Would it be great to avoid, probably yes, but otherwise consider eating it in moderation, on the order of several times(