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Drug absorption in spinal cord injury
Archives of Physical Medicine and Rehabilitation
|May 1, 1985
Summary
Spinal cord injury (SCI) does not significantly alter riboflavin absorption but does affect acetaminophen (ACE) absorption, increasing its time to peak and lag time. These findings are crucial for understanding drug pharmacokinetics in SCI patients.
Area of Science:
- Pharmacokinetics
- Drug Absorption
- Spinal Cord Injury Research
Background:
- Drug absorption can be altered by physiological changes associated with spinal cord injury (SCI).
- Understanding these alterations is vital for optimizing drug therapy in SCI patients.
Purpose of the Study:
- To investigate the impact of SCI on the absorption of an actively transported drug (riboflavin) and a passively absorbed drug (acetaminophen).
- To compare drug absorption parameters between SCI patients and able-bodied individuals.
Main Methods:
- Oral administration of riboflavin (RBF) and acetaminophen (ACE) to SCI patients and controls.
- Measurement of urinary excretion for RBF and serum levels for ACE.
- Analysis of parameters including time to peak, peak excretion rate, percent dose recovered, maximum serum level, half-life, and absorption lag time.
Main Results:
- Riboflavin absorption parameters (time to peak, peak excretion rate, percent dose recovered) were significantly affected by fasting/non-fasting conditions but not by SCI.
- Acetaminophen absorption in SCI patients showed a significantly increased time to peak and lag time, with a decreased maximum serum concentration compared to able-bodied data.
Conclusions:
- SCI significantly impacts the absorption of passively absorbed drugs like acetaminophen.
- Actively transported drugs like riboflavin may not be as affected by SCI in terms of absorption.
- These findings highlight the need for individualized drug dosing strategies in SCI management.