Transdermal Administration by a Novel Wireless Iontophoresis Device

Persons with spinal cord injury (SCI) have neurogenic bowel disorders which is associated with significant morbidity. The negative impact of bowel complications is often at the top of the list of problems reported by persons with SCI. Despite the magnitude of the problem of bowel dysfunction in persons with SCI, and the associated reduction in quality of life, this condition has yet to be effectively treated. The investigators have developed a novel dual drug combination to elicit a safe and predictable bowel evacuation (BE). The ability to move the bowel contents along to the rectum was severely impaired primary because of poor gut contractions on the left side of the colon, as shown by our team of investigators. To address this problem, a dual medication combination (neostigmine and glycopyrrolate) was developed that safely and predictably caused the bowel to empty after delivering these drugs into a vein (intravenously) or into the muscle bed (intramuscularly). Because no one likes needles, and because of the practical limits of administering medications on a routine basis by the use of needles, especially in persons with SCI because of their other health considerations, the investigators have devised a new approach: driving these medications across the skin and into the circulation of the body by applying an electrical current that is too small to feel (iontophoresis). The proposed research project to determine the safety of positively charged compounds (e.g., vitamin B12, NEO, and GLY) administered transcutaneously by the prototype wireless ION device and to compare the pharmacokinetic profiles of transcutaneous administration of NEO and GLY by the wireless ION device to a commercially available wired ION device. The potential administration of any number of other positively charged agents by this wireless prototype may be a clinically relevant outcome of this work. The ability to use a wireless ION device is far more practical for patients to use, especially