946 liters L 1 quart qt 2 pints pt 1 scruple 20 grains gr 1 stone 014 centals 1

1 quart (qt) = 0.946 liters (L) 1 quart (qt) = 2 pints (pt) 1 scruple = 20 grains (gr) 1 stone = 0.14 centals 1 tablespoon (tbsp) = 3 teaspoons (tsp) 1 teacup = 6 ounces (oz) 1 teaspoon (tsp) = 60 drops (gtt) 1 teaspoon (tsp) = 4.93 ml A. Practice Problems 1. 0.3 mg = _____ mcg 2. 60 mg = ______ g 3. Gr. 3 = _____ mg 4. 0.5 L = _____ cc 5. 300 ml = _____ L B. Homework Problems 1. Gr. v = _____ mg 2. 60 mg = _____mcg 3. 1/2 tsp = _____ ml 4. Gr. 1/100 = _____ mg 5. 4 oz = _____ cc 6. 1 oz = _____ cc 7. 1 T = _____ ml 8. 200 mcg = _____ mg 9. 0.1 mg = _____ mcg 5

10. Gr. ss = _____ mg 11. Gr. X = _____ mg 12. drams 2 = _____ ml 13. 20 ml = _____ T. 14. 15 ml = _____ ounce (s) 15. 12 ml = _____ drams 16. 90 ml = _____ ounce (s) 17. 1.3 g = _____ mg 3. Converting Temperatures C = 5/9 ( F -32) Convert 68 F to Celsius C=5/9 (68-32) Step 1: 68-32= 36 Step 2: 5/9= 0.55555555555 Step 3: 0.55555555555 X 36 Answer= 20 C F = 9/5( C) +32 Convert 20 C back to F F= 9/5 (20)+32 Step 1: 9/5= 1.8 Step 2: 1.8 x 20=36 Step 3: 36+32 Answer= 68 F A. Practice Problems 1. 78 F=__ C 2. 37.5 C=__ F 3. 38 C=__ F 4. 100 F=__ C 5. 104 F=__ C B. Homework Problems 1. 40 C=__ F 2. 101.5 F=__ C 3. 39.5 C=__ F 4. 36.3 C=__ F 5. 102.6 F=__ C 6

4. Pills In problems with tablets and capsules, the amount of mg per pill is the bridge factor. Starting Factor: Amount ordered (mg) Unit Answer: Tabs/capsules Bridge Factor: mg/tab or capsule Example: John is ordered 90 mg phenobarbitol. On hand is 30 mg tabs. How many tabs will the nurse administer? Starting Factor: 90 mg Unit Answer: Tabs Bridge Factor: 30 mg/tab 90 mg X 1 tab = 3 tabs 30 mg A. Practice Problems 1. Order: Lasix 20 mg po bid Label: Lasix 40 mg scored tabs Give _____ tab(s) 2. Order: Codeine gr i po q4h prn Label: Codeine 30 mg tabs Give _____ tab(s) 3. Order: Diabenese 0.15 g po bid Label: Diabenese 100 mg tabs scored Give _____ tab(s) 4. Order: Tranxene 7.5 mg po qd Label: Tranxene 3.75 mg capsules Give _____ cap(s) 5. Order: Aspirin gr x Label: Aspirin 325 mg tabs Give: _____ tab(s) B. Homework Problems 1.Order: Nitroglycerine gr. 1/150 SL for chest pain Label reads: Nitroglycerine 0.4 mg tabsHow many tabs would you give?

2. Order: Theo-Dur 0.45 g Label: Theo-Dur 300 mgHow many tablets should be given? 3. Order: Dalmane gr. ss po hs Supply: Dalmane 30 mg capsulesAmount to be given? _________ cap(s) 4. Order: Cefadyl 800 mg po qid Supply: Cefadyl 0.4 g capsules Give: _____ cap(s) 5. Order: Crystodigin 0.05 mg po q am Supply: Crystodigin 100 mcg tablets (scored) Give: _______ tab (s) 6. Order: Quinidine 0.6 g po q4h Available: Quinidine 200 mg tablets Give: _______ tab(s) 5. Suspensions In problems with liquid medications, the bridge factor is the concentration (mg/ml) of the suspension. Example: Ann is ordered 75 mg of Drug X. On hand is Drug X suspension 100 mg/ml. How many ml will the nurse administer? Starting Factor: 75 mg Unit Answer: ml Bridge Factor: 100 mg/ml 75 mg X 1 ml = 0.75 ml 100 mg A. Practice Problems