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qhs every night/bedtime qshift every end of the shift qd daily/everyday bid twice a day qid four times a day po per os-by mouth ng nasogastric sub/subl sublingual iv intravenous im intramuscular sc/subq subcutaneous pr per rectum pv per vagina gutt eye drops occ eye cream gt gastronomy tube id intradermal od right eye os left eye ou both eyes supp suppository susp suspension tab tablet cap capsule sy/syrp syrup e/c enteric-coated m/r modified release