qd : Once a day.

qid : Four times a day.

QNS : Quantity not sufficient.

qod : Every other day.

q2h : Every two hours.

q4h : Every four hours.

q6h : Every six hours.

q8h : Every eight hours.

q12h : Every twelve hours.

qt : Quart.

Quadriparesis : Weakness of all four extremities.

Quarantine : Restriction of the activities of well persons or animals who have been exposed to a case of communicable disease during its period of communicability (i.e., contacts) to prevent disease transmission during the incubation period if infection should occur.

Quartan malaria : Malaria caused by Plasmodium malariae.

Quaternary structure : In proteins, the number and arrangement of individual polypeptides in the final protein molecule.

Quotidian malaria : Type of malaria in which fevers occur every 24hrs; may indicate early infection or mixed infection.