They, their family, or guardian should have consulted their psychiatrist to tune the meds for less side effects or to switch them. That is what psychiatrists are there for.
Especially for schizophrenics, they should never have the option to get off meds, in fact there should be a long acting backup med to go with the normal treatment in case the patient were to skip a dose.
Those with experience with schizophrenia know this is the hardest part of dealing with this mental illness - getting the patient into treatment and onto meds. Sure it is easy to maintain meds, but on boarding is the biggest challenge - that once it is setup, working, and bringing the patient back to reality it needs to be maintained, otherwise the patient and family have another long, uphill battle getting the patient back under treatment.