Latin Phrases

Latin Prescription Abbreviations

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ante cibum (ac)
Before meals

bis in die (bid)
Twice a day

gutta (gt)
Drop

hora somni (hs)
At bedtime

oculus dexter (od)
Right eye

oculus sinister (os)
Left eye

per os (po)
By mouth

post cibum (pc)
After meals

pro re nata (prn)
As needed

quaque 3 hora (q 3 h)
Every 3 hours

quaque die (qd)
Every day

ter in die (tid)
3 times a day

quater in die (qid)
4 times a day

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