Question

A nurse is preparing to administer phenelzine 90 mg PO divided in three equal doses daily to a client who has depression. Available is phenelzine 15 mg tablets. How many tablets should the nurse administer per day? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Answer 1

Correct Answers:

6

Rationale :

Formula:

Total Tablets = Total Daily Dose ÷ Tablet Strength

Prescription: Phenelzine 90 mg/day PO divided in 3 doses

Available: Phenelzine 15 mg tablets

⇨ Total Dose: 90 mg

⇨ Tablet Strength: 15 mg

⇨ Calculation: 90 ÷ 15

= 6 tablets/day

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 2

Correct Answers:

Time

Rationale :

☑️ A complete prescription should include the time or frequency of administration to prevent under- or overdosing.

☑️ "30 mg PO" provides the correct medication, dose, and route but lacks timing (e.g., bedtime).

☑️ Time is especially important for sedatives like temazepam to ensure safe use.

☑️ Omitting timing could cause adverse effects like daytime drowsiness or interaction with other CNS depressants.

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 3

Correct Answers:

1.6

Rationale :

☑️Formula:

Volume = Dose ÷ Concentration

Prescription: Chlorpromazine 40 mg IM

Available: 25 mg/mL

⇨ Dose: 40 mg

⇨ Concentration: 25 mg/mL

⇨ Calculation:

🔺 40 ÷ 25

= 1.6 mL

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 4

Correct Answers:

300

Rationale :

🔺Formula:

✔️Convert grams to milligrams

Prescription: Lithium 0.3 g PO

⇨ Dose in grams: 0.3 g

⇨ Conversion: 0.3 g × 1,000

👉🏻= 300 mg

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 5

Correct Answers:

3

Rationale :

Formula:

☑️Convert grams to milligrams

⇨ Prescription: Lorazepam 0.003 g PO

⇨ Dose in grams: 0.003 g

⇨ Conversion: 0.003 × 1,000

👉🏻= 3 mg

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 6

Correct Answers:

1.5

Rationale :

Formula:

☑️Volume = Dose ÷ Concentration

Prescription: Hydroxyzine 75 mg IM

Available: 50 mg/mL

⇨ Dose: 75 mg

⇨ Concentration: 50 mg/mL

⇨ Calculation: 75 ÷ 50

👉🏻= 1.5 mL

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 7

Correct Answers:

1.5

Rationale :

Formula:

❇️ Tablets = Dose ÷ Tablet Strength

Prescription: Sertraline 75 mg PO

Available: 50 mg tablets

⇨ Dose: 75 mg

⇨ Tablet strength: 50 mg

⇨ Calculation: 75 ÷ 50

👉🏻= 1.5 tablets

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 8

Correct Answers:

1.2

Rationale :

Formula:

☑️Volume = Dose ÷ Concentration

Prescription: Fluphenazine 3 mg IM

Available: 2.5 mg/mL

⇨ Dose: 3 mg

⇨ Concentration: 2.5 mg/mL

⇨ Calculation: 3 ÷ 2.5

👉🏻= 1.2 mL

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 9

Correct Answers:

1.5

Rationale :

Formula:

☑️Volume = Dose ÷ Concentration

Prescription: Haloperidol 75 mg IM

Available: 50 mg/mL

⇨ Dose: 75 mg

⇨ Concentration: 50 mg/mL

⇨ Calculation: 75 ÷ 50

👉🏻= 1.5 mL

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

Answer 10

Correct Answers:

2

Rationale :

Formula:

☑️Volume = Dose ÷ Concentration

Prescription: Risperidone 25 mg IM

Available: 25 mg/2 mL

⇨ Dose: 25 mg

⇨ Concentration: 12.5 mg/mL (from 25 mg ÷ 2 mL)

⇨ Calculation: 25 ÷ 12.5

👉🏻 = 2 mL

Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

ATI LPN Dose Calculation-Mental Health Proctored Assessment 3.1

No.

2 :
A nurse is reviewing a client's new prescription for temazepam 30 mg PO. Which of the following should the nurse clarify with the provider?

4 :
A nurse is preparing to administer 0.3 g of lithium PO to a client. How many mg of lithium should the nurse administer to the client? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

5 :
A nurse is preparing to administer lorazepam 0.003 g PO to a client who has anxiety. How many mg 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.)

7 :
A nurse is preparing to administer sertraline 75 mg PO to a client who has post-traumatic stress disorder. Available is sertraline 50 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.)

9 :
A nurse is preparing to administer haloperidol 75 mg IM to a client who has schizophrenia. Available is haloperidol 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.)

Connect With Us

ATI LPN Dose Calculation-Mental Health Proctored Assessment 3.1

No.

2 : A nurse is reviewing a client's new prescription for temazepam 30 mg PO. Which of the following should the nurse clarify with the provider?

4 : A nurse is preparing to administer 0.3 g of lithium PO to a client. How many mg of lithium should the nurse administer to the client? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

5 : A nurse is preparing to administer lorazepam 0.003 g PO to a client who has anxiety. How many mg 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.)

7 : A nurse is preparing to administer sertraline 75 mg PO to a client who has post-traumatic stress disorder. Available is sertraline 50 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.)

9 : A nurse is preparing to administer haloperidol 75 mg IM to a client who has schizophrenia. Available is haloperidol 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.)

2 :
A nurse is reviewing a client's new prescription for temazepam 30 mg PO. Which of the following should the nurse clarify with the provider?

4 :
A nurse is preparing to administer 0.3 g of lithium PO to a client. How many mg of lithium should the nurse administer to the client? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

5 :
A nurse is preparing to administer lorazepam 0.003 g PO to a client who has anxiety. How many mg 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.)

7 :
A nurse is preparing to administer sertraline 75 mg PO to a client who has post-traumatic stress disorder. Available is sertraline 50 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.)

9 :
A nurse is preparing to administer haloperidol 75 mg IM to a client who has schizophrenia. Available is haloperidol 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.)