Video Library
Ati Dosage calculation rn mental health proctored exam
Total Questions : 27
Showing 10 questions, Sign in for moreA nurse is preparing to administer perphenazine 200 mg divided into four equal doses daily to a client who has psychosis. Available is perphenazine oral solution16 mg/mL. How many mL should the nurse administer per dose? Round the answer to the nearest tenth. (Use a leading zero if it applies. Do not use trailing zeros.)
Explanation
Given:
- Total perphenazine to be administered: 200 mg
- The medication is to be divided into four equal doses
- Available perphenazine oral solution: 16 mg/mL
Step 1: Calculate the amount of perphenazine per dose
200 mg ÷ 4 = 50 mg/dose
Step 2: Calculate the volume of the oral solution per dose
(50 mg/dose) ÷ (16 mg/mL) = 3.125 mL/dose
Rounding to the nearest tenth, the nurse should administer 3.1 mL
A nurse is preparing to administer diphenhydramine 30 mg IM to a client. Available isdiphenhydramine injection 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Define the total amount of diphenhydramine needed Total dose = 30 mg
Step 2: Define the concentration of the available diphenhydramine injection Concentration = 50 mg/mL
Step 3: Calculate the volume of diphenhydramine injection needed Volume = Total dose ÷ Concentration Volume = 30 mg ÷ 50 mg/mL Volume = 0.6 mL
The nurse should administer 0.6 mL of diphenhydramine injection per dose
A nurse is preparing to administer Buspirone 6 mg PO divided into two equal doses daily to a client who has generalized anxiety disorder. Available is buspirone 5 mg tablets.
How many tablets should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The total daily dosage of Buspirone is 6 mg, which is divided into two equal doses. So, each dose will be 6 mg ÷ 2 = 3 mg.
Step 2: Each tablet of Buspirone contains 5 mg. To find out how many tablets make up a 3 mg dose, we divide the dose by the amount in each tablet. So, 3 mg ÷ 5 mg/tablet = 0.6 tablets.
Step 3: Since we can't administer a fraction of a tablet, we round this to the nearest whole number. So, 0.6 tablets rounds to 1 tablet.
So, the nurse should administer 1 tablet per dose.
A nurse is preparing to administer risperidone 1.5 mg PO every 12 hours to a patient who has schizophrenia. Available is risperidone solution1 mg/mL.
What is the total daily dose in mL the nurse should administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Calculate the total daily dose in mg
The prescribed dose is1.5 mg every 12 hours. Since there are 24 hours in a day, the total daily dose in mg is1.5 mg × 2 = 3 mg.
Step 2: Calculate the total daily dose in mL
The available risperidone solution is1 mg/mL. So, to find out the total daily dose in mL, we divide the total daily dose in mg by the concentration of the solution. That is,3 mg ÷ 1 mg/mL = 3 mL.
The total daily dose in mL the nurse should administer is 3 mL. This is rounded to the nearest whole number as per your instructions.
A nurse is preparing to administer sertraline 0.05 g PO to a school-age child who has obsessive-compulsive disorder. Available is sertraline oral solution20 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Convert the dose from grams to milligrams. We know that 1 gram = 1000 milligrams. So, 0.05 grams = 0.05 × 1000 = 50 milligrams.
Step 2: Calculate the volume of the solution to administer. The formula is Dose (mg) ÷ Concentration (mg/mL) = Volume (mL). So, 50 mg ÷ 20 mg/mL = 2.5 mL.
The nurse should administer 2.5 mL of sertraline oral solution.
A nurse is preparing to administer aripiprazole 9 mg IM to a client. Available is aripiprazole injection 9.75 mg/3 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The dose to be administered is9 mg of aripiprazole.
Step 2: The available aripiprazole injection has a concentration of9.75 mg/3 mL. This means that for every 3 mL of the solution, there are 9.75 mg of aripiprazole.
Step 3: To find out how many mL should be administered, we divide the dose by the concentration. So, 9 mg ÷ (9.75 mg/3 mL) = 2.769230769230769 mL.
Step 4: Round the answer to the nearest tenth. So, 2.769230769230769 mL rounds to2.8 mL.
The nurse should administer 2.8 mL of aripiprazole injection.
A nurse is preparing to administer chlorpromazine 50 mg IM to a client. Available is chlorpromazine 25 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The dose to be administered is50 mg of chlorpromazine.
Step 2: The available chlorpromazine injection has a concentration of25 mg/mL. This means that for every 1 mL of the solution, there are 25 mg of chlorpromazine.
Step 3: To find out how many mL should be administered, we divide the dose by the concentration. So, 50 mg ÷ 25 mg/mL = 2 mL.
The nurse should administer 2 mL of chlorpromazine injection.
A nurse is preparing to administer methylphenidate 18 mg PO to a school-age child who has attention deficit disorder. Available is methylphenidate oral solution 10 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The dose to be administered is 18 mg of methylphenidate.
Step 2: The available methylphenidate oral solution has a concentration of10 mg/mL. This means that for every 1 mL of the solution, there are 10 mg of methylphenidate.
Step 3: To find out how many mL should be administered, we divide the dose by the concentration. So, 18 mg ÷ 10 mg/mL = 1.8 mL.
Step 4: Round the answer to the nearest whole number. So, 1.8 mL rounds to2 mL.
The nurse should administer 2 mL of methylphenidate oral solution.
A nurse is preparing to administer haloperidol decanoate 75 mg IM to a client who has schizophrenia. Available is haloperidol decanoate injection 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The dose to be administered is75 mg of haloperidol decanoate.
Step 2: The available haloperidol decanoate injection has a concentration of50 mg/mL. This means that for every 1 mL of the solution, there are 50 mg of haloperidol decanoate.
Step 3: To find out how many mL should be administered, we divide the dose by the concentration. So, 75 mg ÷ 50 mg/mL = 1.5 mL.
The nurse should administer 1.5 mL of haloperidol decanoate injection.
A nurse is preparing to administer amitriptyline 50 mg PO to a client who has depression. Available is amitriptyline 100 mg tablets. How many tablets should the nurse administer?
(Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
The nurse needs to administer 50 mg of amitriptyline and each tablet contains 100 mg.
Step 1 is: Calculate the number of tablets by dividing the required dose by the dose available per tablet.
So, 50 mg (required dose) ÷ 100 mg/tablet (dose per tablet)
Step 2 is: Perform the division.
This gives us 0.5 tablets.
Step 3 is: Round the answer to the nearest tenth as instructed.
So, 0.5 rounded to the nearest tenth is 0.5.
Sign Up or Login to view all the 27 Questions on this Exam
Join over 100,000+ nursing students using Naxlex’s science-backend flashcards, practice tests and expert solutions to improve their grades and reach their goals.
Sign Up Now
