Rhus toxicodendron Pentarkan Ptk 73 is used for rheumatic muscle and joint complaints. It helps with acute states of tension and pain that occur, for example, after a cold, soaking or overexertion.Rhus toxicodendron Pentarkan Ptk 73 is used for rheumatic muscle and joint complaints. It helps with acute states of tension and pain that occur, for example, after a cold, soaking or overexertion.