get_medrt_moa() is a convenience wrapper for get_medrt() that returns
MED-RT mechanism-of-action assertions when available. Not all drugs have
MED-RT has_moa assertions; for some drugs, mechanism-like or class-like
information may instead be available from FDA/SPL EPC via get_epc() or as
physiologic effects via get_medrt_pe().
Usage
get_medrt_moa(
x,
by = c("rxcui", "name"),
keep_input = TRUE,
show_progress = interactive()
)