This is the kind of eso­ter­ica I love! Now I know that my doc­tor pre­scribed 10mg Ambien to be taken orally before bed, and that I get thirty of them. I feel as though I have decoded some encoded spy mes­sage— [Except that no one was try­ing to keep info from you…] Shhh! Don’t ruin my fun!

How Often to Take Your Medication

  • ad lib — freely, as needed
  • bid — twice a day
  • prn — as needed
  • q — every
  • q3h — every 3 hours
  • q4h — every 4 hours
  • qd — every day
  • qid — four times a day
  • qod — every other day
  • tid — three times a day

When to Take Your Medication

  • ac — before meals
  • hs — at bedtime
  • int — between meals
  • pc — after meals

How Much Med­ica­tion to Take

  • caps — capsule
  • gtt — drops
  • i, ii, iii, or iiii — the num­ber of doses (1, 2, 3, or 4)
  • mg — milligrams
  • ml — milliliters
  • ss — one half
  • tabs — tablets
  • tbsp — table­spoon (15ml)
  • tsp — tea­spoon (5ml)

How to Use Your Medication

  • ad — right ear
  • as — left ear
  • c or o — with
  • od — right eye
  • os — left eye
  • ou — both eyes
  • po — by mouth
  • s or ø — without
  • sl — sublingual
  • top — apply topically

Taken from http://healthinsurance.about.com/od/prescriptiondrugs/a/understanding_MD_Rx.htm

I remem­ber being equally thrilled to learn the letter-number com­bi­na­tions that served as short­hand for panda researchers at the zoo. If mem­ory serves, 4C was some kind of erratic move­ment or twitch­ing. I wish I could find a cheat sheet for that info…