TL;DR
Dilution Calculations: C1V1 = C2V2 formula for determining volumes needed when diluting concentrated solutions to desired concentrations.
Dilution Calculations
Definition
C1V1 = C2V2 formula for determining volumes needed when diluting concentrated solutions to desired concentrations.
Practical Example
Pharmacy Calculation Example: dilution
Formula: C1V1 = C2V2
Worked example: Dilute 70% alcohol to 30%: (70)(V1) = (30)(500mL), V1 = 214.3 mL
Exam Focus Areas
On the Ptcb, Medical Assistant exam(s), questions about dilution calculations typically test:
- Mathematical calculations: dosage, days supply, dilutions, and compounding
- Drug interactions and contraindications that affect patient safety
- Drug classification, mechanism of action, and common side effects
- Federal and state regulations governing practice
Historical Context
Pharmacy regulation in the U.S. began with the Pure Food and Drug Act of 1906. The Federal Food, Drug, and Cosmetic Act of 1938 required proof of safety. The 1962 Kefauver-Harris Amendment added efficacy requirements. Understanding dilution calculations within this regulatory history helps pharmacy technicians appreciate why current standards exist, as each major regulation was prompted by a public health crisis.
Step-by-Step Procedure
C1V1 = C2V2 formula for determining volumes needed when diluting concentrated solutions to desired concentrations. Dilution calculations tested on PTCB and MA exams.
Related drug class: Statins includes atorvastatin, rosuvastatin, simvastatin. Mechanism: HMG-CoA reductase inhibitors, decrease hepatic cholesterol synthesis, upregulate LDL receptors.
Why It Matters
Dilution calculations tested on PTCB and MA exams.
Related Terms
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