If you have been snookered into letting them inject that garbage into you, do what the hieromonk did. Confess, repent, and don't take any more doses. Don't think that you're already pecked and so to stand on principle now would be meaningless. Standing on principle is never meaningless.Multitudes, multitudes in the valley of decision! For the day of the Lord is near in the valley of decision.
Standing on your principles is probably one of the most important things you can do in your life. The world can take a lot of things away from you. The world is cruel, and full of outright bastards. Bastard-coated bastards with bastard filling. And they hate you. They don't even know you, but they hate you.
The world can take away your job. Your house, perhaps. Take away your way to earn a living. They can take away your comfort, your recreations. But they can't take away your integrity. That can only be given away, and only you have that power. Don't give it away. When the entire world turns against you, (and if you follow Christ it WILL turn against you at some point), you can still stand before God with a clean heart, because you stood on your principles and didn't compromise them.