My psych unit would consider IV's to be a safety risk due to the number of suicidal patients, etc. Patients needing that kind of medical intervention would be treated on a regular hospital floor until they are medically stable enough to be on the psych unit. The only time I ever had IV's was during ECT which was done on a different floor (outpatient surgery). IV was administered just prior to ECT and removed just following it and before returning to the psych unit.