LPNs and/or LVNs are supervised by both doctors and RNs. Doctors oversee the overall care of patients and provide guidance to LPNs and/or LVNs in terms of treatment plans and medication administration. RNs, on the other hand, provide direct supervision and support to LPNs and/or LVNs, ensuring that they are following protocols and delivering safe and effective care. Therefore, both doctors and RNs play a role in supervising LPNs and/or LVNs.