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Published byAubrie Stephens Modified over 9 years ago
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Liquid Oral Medications (cont.) To calculate the volume of liquid oral medication to administer, use: –proportion –formula –dimensional analysis
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Liquid Oral Medications (cont.) Find the amount to administer. Ordered: Granisetron 5 mg PO now On hand: Granisetron 2 mg per 10 mL oral solution Use the calculation method of choice.
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Calculating Dosages – Liquid Oral Medications (cont.) H = 2 mg ; Q = 10 mL; D = 5 mg Step A Convert No conversion is necessary.
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Calculating Dosages – Liquid Oral Medications (cont.) Step B ProportionH/Q = D/A or H:Q = D:A 2 mg / 10 mL = 5 mg / A 2 x A = 10 mL x 5 2A / 2 = 50 mL / 2 A = 25 mL
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Calculating Dosages – Oral Solid Medications (cont.) Step B Dimensional analysis A = Q / H x D / 1 A mL = 10 mL / 2 mg x 5 mg / 1 A mL = 50 mL / 2 A mL= 25 mL
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Calculating Dosages – Oral Solid Medications (cont.) Step B Formula Method 5mg / 2mg x 10 mL = A 50 mL / 2 = A 25 mL = A
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Calculating Dosages – Liquid Oral Medications (cont.) Step C Think!... Is It Reasonable? 5 mg is two and one-half times 2 mg, and 25 mL is 2.5 times 10 mL, so it is a reasonable amount.
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Patient Education Use the measuring device provided or a device specifically made for measuring medications. –Household teaspoons and tablespoons do not always measure liquids accurately.
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Practice Ordered: Erythromycin oral suspension 0.5 g po q6 h On hand: see label (prior slide) What is the amount to administer? ANSWER: 12.5 mL
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