Colonic medication bezoar from extended-release nifedipine and procainamide
T. Reid, J. B. Rubins, J. Levine, J. DeCelles and S. Silvis
Department of Medicine, Veterans Affairs Medical Center, Minneapolis, USA.
We report an unusual case of a primary colonic bezoar composed of
extended-release formulations of nifedipine and procainamide. Although
these bezoars are rare, the increasingly frequent application of
extended-release delivery systems to other commonly prescribed medications
may increase the incidence of such bezoars in vulnerable patients.
Clinicians should be aware of this potential problem when prescribing these
medications, and have a high index of suspicion when painful or refractory
constipation occurs.
