As an ex-combat medic I carried 2x grenade. Never used them in anger and I remember passing one over to a buddy while I was treating a casualty. I would have had no problems lobbing it at someone if I need to though.
This may (again) just becoming from a British perspective but the "do not harm" as a medic was pretty BS. In a contact I was just another rifleman putting rounds down at the enemy until I was needed. Yes technically my weapons were for myself and my casualties protection but think about it...would you really just sit there not shooting in a firefight when you could just "protect yourself" and help out. No, no you wouldn't
The Hippocratic Oath is pretty outdated these days and isn't legally binding. Thankfully over here we never had to bother with such a silly thing.
On the subject of all team mates reviving....as mentioned before in the thread. These days all soldiers are trained how to treat themselves and others to a pretty high standard. Even the "militia" groups back in Afghan had a surprisingly high level of treatment and evac chain.