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Relationship between dissolution rate and bioavailability of paracetamol tablet.
Xiao-ping Huang1, Xin-xiang Wan, Qiang Liu
1Teaching and Research Section of Pharmacy, Department of Medical Laboratory Technology, First Military Medical University, Guangzhou 510315, China.
Di 1 Jun Yi Da Xue Xue Bao = Academic Journal of the First Medical College of PLA
|April 17, 2003
Summary
The dissolution rate of paracetamol tablets strongly correlates with their bioavailability. Measuring dissolution provides a reliable method to predict paracetamol bioavailability in patients.
Area of Science:
- Pharmaceutical Sciences
- Pharmacokinetics
- Drug Formulation
Background:
- Paracetamol is a widely used analgesic and antipyretic.
- Ensuring consistent bioavailability of paracetamol tablets is crucial for therapeutic efficacy.
- Dissolution rate is a key in vitro parameter influencing drug absorption.
Purpose of the Study:
- To examine the correlation between paracetamol tablet dissolution rate and in vivo bioavailability.
- To establish a predictive model for paracetamol bioavailability based on dissolution data.
Main Methods:
- Dissolution testing of five paracetamol tablet formulations according to Chinese Pharmacopoeia standards.
- Determination of paracetamol urine concentrations via ultraviolet spectrophotometry.
- Assessment of relative bioavailability in 25 healthy male volunteers.
Main Results:
- Significant linear relationship observed between dissolution rate and bioavailability (r=0.9642).
- The established equation y = 0.6122x + 25.175 accurately models this relationship.
- Varied dissolution rates among formulations directly impacted their respective bioavailability.
Conclusions:
- Dissolution rate is a strong predictor of paracetamol tablet bioavailability.
- In vitro dissolution testing can be utilized to estimate in vivo bioavailability, simplifying quality control.