Final answer:
An LTC consultant pharmacist should report irregularities, such as serious adverse drug events, directly to the FDA within 15 days, and less serious events quarterly. The MedWatch program also allows for voluntary reporting.
Step-by-step explanation:
An LTC consultant pharmacist must report irregularities, including unexpected serious and fatal adverse drug events, to the Food and Drug Administration (FDA). These reports should be made within 15 days of discovering the event. Additionally, other adverse drug events of a less serious nature must be reported on a quarterly basis. The FDA's MedWatch program also provides a platform for the voluntary reporting of adverse drug events by consumers and health professionals, which are categorized as "spontaneous reports".