Hello Dear Doctor.. My Father Done Angooplasty And Implated Restent

hello dear doctor.. my father done angooplasty and implated restent wich was drug stent.
he was fine on first day but i dont know next day he started vomiting.. weekness.. cant even sit proparly and fatigue today he got swollen face when he woke up?
is this symptoms is ok? .. plz guide me doctor
he is taking plavix also