Calculate the dosage using the label below. Round to the nearest tenth place. Order: Celestone, Soluspan (betamethasone) 12 mg IM q24 hr. for 2 doses. Available
0.5 mL sub-cut
1 mL Stat
4 mL IV
2 mL IM
The Correct Answer is D
Rationale:
Ordered Dose:
The prescription is for 12 mg of Celestone Soluspan (betamethasone) IM every 24 hours for 2 doses.
Available Dose (from label): The vial contains 6 mg/mL.
Dosage Calculation: Using the formula:
Volume to administer (mL) = Available concentration (mg/mL) / Ordered dose (mg)
Volume to administer = 12mg / 6mg/mL = 2 mL
Administration Route:
The order specifies IM (intramuscular) administration, aligning with the label instructions.
Thus, 2 mL IM is the correct dosage to administer.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Given:
Ordered dose of phenobarbital: 6 mg/kg/day divided equally every 12 hours
Patient weight: 44 lbs
Concentration of phenobarbital elixir: 20 mg/5 mL
Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 44 lbs x 0.453592 kg/lb = 19.958 kg
Step 2: Calculate the total daily dose of phenobarbital:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Patient weight (kg)
Total daily dose (mg) = 6 mg/kg/day x 19.958 kg
Total daily dose (mg) = 119.748 mg/day
Step 3: Calculate the dose per administration:
Dose per administration (mg) = Total daily dose (mg) / Number of administrations per day
Dose per administration (mg) = 119.748 mg/day / 2 administrations/day
Dose per administration (mg) = 59.874 mg
Step 4: Calculate the volume to be administered per dose:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 59.874 mg / (20 mg/5 mL)
Volume (mL) = 59.874 mg x (5 mL / 20 mg)
Volume (mL) = 14.9685 mL
Step 5: Round to the nearest whole number:
Volume (mL) ≈ 15 mL
Correct Answer is B
Explanation
A) Esophagus
Enteric-coated tablets are designed to not dissolve or disintegrate in the esophagus. They are coated with a protective layer that prevents the tablet from breaking down in the acidic environment of the stomach. This is to ensure that the medication is released in the part of the digestive tract where it is most needed, typically beyond the stomach.
B) Duodenum
Enteric-coated tablets are designed to disintegrate in the duodenum, which is the first part of the small intestine. The coating protects the tablet from stomach acid, allowing it to pass intact through the stomach and into the small intestine, where the pH is higher and the coating dissolves, releasing the medication for absorption.
C) Stomach
Enteric-coated tablets are specifically designed not to disintegrate in the stomach because the stomach's acidic environment could either damage the drug or cause premature release. The coating ensures that the drug is protected until it reaches the more neutral pH of the duodenum.
D) Colon
The colon is too far along in the digestive tract for enteric-coated tablets to typically disintegrate. The design of enteric coatings is intended to protect the drug until it reaches the duodenum, where absorption is most efficient. Enteric coatings are not meant to disintegrate in the colon.
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