Problem 43 - Calculate With Confidence

Question

Interpret the following orders. Use either administer or give at the beginning of the sentence. Dilantin \(100 \mathrm{mg}\) p.o. t.i.d.

Step-by-Step Solution

Answer

Administer Dilantin 100 mg orally, three times a day.

Step 1: Identify the medication

First, identify the name of the medication in the order. The medication here is 'Dilantin'.

Step 2: Determine the dosage

Next, find the dosage amount for the medication. It is given as 100 mg.

Step 3: Understand the route of administration

Look for the route of administration in the order. The abbreviation 'p.o.' stands for 'per os', which means orally.

Step 4: Determine the frequency

Find the frequency of dosage in the order. The abbreviation 't.i.d.' stands for 'ter in die', meaning three times a day.

Step 5: Compile the instruction

Combine the information from the previous steps to form a complete instruction: 'Administer Dilantin 100 mg orally, three times a day.'

Key Concepts

Dosage Calculation

Dosage calculation is crucial in ensuring that a patient receives the correct amount of medication at the right time. In our example, the dosage is given as 100 mg. Understanding the dosage helps in preventing under or overdosing, which can lead to ineffective treatment or adverse effects. When calculating dosage, always pay attention to the unit (for example, milligrams or grams), ensuring it matches the instructions given.

Here are some tips for accurate dosage calculation:

• Double-check the prescribed dosage to ensure it's within the recommended range for the medication.
• Convert measurement units if necessary (for example, from grams to milligrams).
• Consider the patient's age, weight, and health condition, as these factors may influence the dosage.

Route of Administration

The route of administration refers to how the medication enters the body. In our order, the abbreviation 'p.o.' indicates the oral route, meaning the medication is taken by mouth. Knowing the route is essential because it affects how quickly a drug works and its effectiveness.

Different routes offer different benefits:

• Oral (p.o.): Common and convenient, has a slower absorption rate.
• Intravenous (i.v.): Fast action directly into the bloodstream.
• Intramuscular (i.m.): Useful for medications that need to be absorbed slowly over time.
• Topical: For local effects directly on the skin.

Choosing the correct route is necessary to maximize efficacy and minimize harm.

Dosage Frequency

Dosage frequency specifies how often a medication is taken in a given timeframe. For Dilantin, the abbreviation 't.i.d.' means the medication should be taken three times a day. Understanding frequency ensures the medication maintains therapeutic levels in the bloodstream to work effectively.

Here's how to approach it:

• Follow the prescribed frequency to maintain adequate drug levels.
• Be aware of any specific timing instructions, such as 'before meals' or 'at bedtime.'
• Consider the half-life of the medication, which can influence how frequently the drug needs to be taken.

Proper awareness of dosage frequency helps in maximizing the treatment's effectiveness while minimizing side effects.