Search PubMed⌕ Search

Biomedical subjects

S Dunham

Publications and source records attributed to S Dunham.

4 recordsLinked to original sources

Medication nonadherence and its relation to financial restriction.

The question of patient nonadherence has always been an important factor in determining candidate suitability for organ transplantation. Data that explore the association of financial problems and posttransplant medication nonadherence are limited. Findings suggest that medication nonadherence was more likely to occur when recipients did not have insurance coverage and had to rely on Medicaid or indigent drug programs. Our center developed a formalized program within the outpatient pharmacy, including a full-time medication counselor who helped recipients secure resources to pay for pre- and posttransplant medications. To determine whether the availability of posttransplant medications could reduce medication nonadherence, we conducted a survey with 50 consecutive liver transplant recipients in the outpatient clinic. Nonadherence rates were significantly reduced from 25% to 10% (P < .01) compared with recipients who had been transplanted before the development of our drug program. These results suggest that optimum medication adherence can be obtained when recipients are provided guidance in securing their necessary medications without financial restriction.

Drug Costs↗

Monolithic tetracycline-containing fibers for controlled delivery to periodontal pockets.

For the purpose of developing controlled delivery devices for periodontal therapy which would release over several days, six fiber types made of tetracycline-loaded biocompatible polymers were manufactured and tested. Polyethylene, polypropylene, polycaprolactone, polyurethane and cellulose acetate propionate all released their drug load within 1 day. Ethylene vinyl acetate fibers, however, provided in vitro sustained release for periods up to 9 days. A bioassay was designed to measure levels of tetracycline achieved by local delivery which used growth inhibition of Bacillus cereus as a measure of the amount of tetracycline in measured volumes of gingival sulcus fluid on filter paper strips. By this assay, fibers made from 25% loaded ethylene vinyl acetate established initial concentrations of approximately 500 micrograms/ml. The measurement of tetracycline concentration resulting from the placement of these fibers into deep periodontal pockets as a packing material provided indication that concentrations of greater than 50 micrograms/ml could be maintained for months by weekly to monthly replacement. These studies indicate that monolithic fibers made of tetracycline-loaded ethylene vinyl acetate have characteristics which could prove useful as the basis of a tetracycline delivery system for the treatment of periodontal disease.

Delayed-Action Preparations↗