Problem 1 - Calculate With Confidence

Question

Calculate the following dosages using the medication label or information provided. Label answers correctly: tabs, caps, mL. Answers expressed in milliliters should be rounded to the nearest tenth where indicated. Order: Phenobarbital 30 mg p.o. t.i.d. Available: Phenobarbital tablets labeled 30 mg _____________________________

Step-by-Step Solution

Answer

Administer 1 tablet (30 mg) of Phenobarbital orally, three times each day.

Step 1: Understand the Order

The physician has ordered Phenobarbital 30 mg to be taken by mouth three times a day. The abbreviation "p.o." stands for "per os", meaning by mouth, and "t.i.d." stands for "ter in die", meaning three times a day.

Step 2: Review Medication Availability

Check what form of the medication is available. The available form is Phenobarbital tablets, each labeled as containing 30 mg of the active ingredient.

Step 3: Match the Dosage with Available Form

Since the order is for 30 mg and the tablets available are also 30 mg each, you can match the order directly with one tablet per dose.

Step 4: Calculate the Total Daily Dosage

The order is for the medication to be taken three times a day. Hence, the total daily dosage is 3 tablets of 30 mg, which equals 90 mg per day. However, each dose remains 1 tablet as ordered.

Step 5: Finalize and Label Your Answer

Since the order and availability match, the answer to the dosage calculation is 1 tablet per dose, taken three times a day. The label you need to provide is "tablets."

Key Concepts

Medication Administration

Medication administration refers to the process of safely providing a patient with their prescribed medicine. This involves understanding both the healthcare provider's instructions and the medication's specifics. In this scenario, **Phenobarbital** is ordered, requiring dosage forms, methods, and schedules to be considered. Administering medication involves several steps:

• Verify the medication order: Ensure it matches the healthcare provider's instructions.
• Check the patient's medical history and condition: This determines appropriateness and potential contraindications.
• Understand abbreviations used in prescriptions: 'p.o.' means orally, and 't.i.d.' means three times daily.
• Ensure correct patient identification: Avoid errors by confirming identity before administration.
• Observe patients for response and side effects: Monitoring is crucial to ensure safety.

Having a clear understanding of these components helps maintain effectiveness and safety in medication administration.

Tablet Dosage

Tablet dosage calculation involves understanding the medication's required amount and matching it with the available form. In this example, Phenobarbital is available in 30 mg tablets, which precisely fits the ordered amount:

• **Understand the prescribed amount:** The order requires 30 mg per dose.
• **Check available medication form:** Determine if tablets, capsules, or liquid formulations are on hand.
• **Assess the match between order and availability:** 30 mg as ordered aligns with one tablet of the available product.
• **Determine dosing frequency:** Ordered as 't.i.d.', meaning three times a day.

With available tablets matching the prescribed dosage, calculating the correct quantity per dose becomes straightforward. This ensures consistency and accuracy in medication delivery.

Mathematical Steps in Healthcare

Mathematical calculations in healthcare are crucial to ensure proper dosage, safety, and efficacy. Understanding these calculations reduces medication errors and enhances patient outcomes. In this exercise involving Phenobarbital:

• **Identify and interpret the prescription:** The order specifies 30 mg three times a day.
• **Calculate total daily dosage:** 30 mg multiplied by three doses equals 90 mg daily.
• **Align with the available formulation:** As each tablet provides 30 mg, one tablet suffices per dose.
• **Round if necessary:** Liquid medications need rounding to nearest tenth when required in deciliters or milliliters.

Completing these mathematical steps accurately ensures patients receive the correct therapeutic effect, maintaining their health and well-being.