An Open Label Study to Examine the Effect of Coated Nifedipine Suppositories on Anal Pressure in Healthy Subjects

"Subjects will take rectally a total of 3 Coated Suppositories per study. 90 minutes after each coated suppository insertion this suppository will be removed and a amnometric study will be performed:~The first dose will contain 4 mg of Nifedipine and the manomentric measurement performed afterwards will be used to determine baseline anal pressures.~The second dose will contain 12 mg of Nifedipine. The third dose will contain 24 mg of Nifedipine."