c.n. (tomorrow night (cras nocte))

c.n.s. (to be taken tomorrow night (cras nocte sumendus))

c/o (complains of)

C/S (consult)

C/TG (cholesterol/triglyceride ratio)

C/w (continue with)

C/w (consistent with)

C&A (conscious and alert)

C&C (confirmed and compatible)

C&DB (cough and deep breath)