Nifedipine Bioavailability Study With Oral Single Doses Under Fasting and Fed Conditions

Inclusion Criteria: 1. sex: male 2. ethnic origin: Caucasian 3. age: 18 - 55 years, inclusive 4. body-mass index (BMI): ³ 22 kg/m² and £ 27 kg/m² 5. good state of health (no clinically significant deviations from normal clinical results and laboratory findings) 6. the subject must give written informed consent, after having been informed about benefits and potential risks of the trial, as well as details of the insurance taken out to cover the subject's participating in the study Exclusion Criteria: 1. existing cardiac or haematological diseases and/or pathological findings, which might interfere with the drug's safety, tolerability, absorption and/or pharmacokinetics 2. existing hepatic and/or renal diseases and/or pathological findings, which might interfere with the drug's safety, tolerability, absorption and/or pharmacokinetics 3. existing gastrointestinal diseases and/or pathological findings, including severe gastrointestinal or esophageal constriction or narrowing, which might interfere with the drug's safety, tolerability, absorption and/or pharmacokinetics 4. history of relevant CNS and/or psychiatric disorders and/or currently treated CNS and/or psychiatric disorders 5. relevant pathological changes in the ECG (12 standard leads) such as a second- or third-degree AV block, complete bundle branch block, prolongation of the QRS complex over 120 msec or the QTc-interval above 450 msec 6. known allergic or intolerance reactions to the active ingredient used or to constituents of the pharmaceutical preparations (e.g. lactose intolerance) 7. subjects with severe allergies or multiple drug allergies 8. systolic blood pressure below 110 mmHg or above 155 mmHg 9. diastolic blood pressure below 60 mmHg or above 95 mmHg 10. resting heart rate in the awake subject below 45 bpm or above 90 bpm 11. laboratory values out of normal range unless the deviation from normal is judged as not relevant for the study by the investigator 12. positive anti-HIV-test, HBs-AG-test or anti-HCV-test Lack of suitability for the trial 13. acute or chronic diseases which could affect absorption or metabolism 14. history of or current drug or alcohol dependence 15. regular intake of alcoholic food or beverages of ≥ 40 g pure ethanol per day 16. subjects who are on a diet which could affect the pharmacokinetics of the drug 17. regular intake of caffeine containing food or beverages of ≥ 500 mg (calculated as caffeine) per day 18. heavy smokers (≥ 10 cigarettes per day or equivalents of other nicotine containing products) 19. blood donation or other blood loss of more than 400 ml within the last two months prior to the start of the study 20. participation in a clinical trial during the last two months prior to individual enrolment of the subject 21. regular treatment with any systemically available medication (except hormonal replacement therapy e.g. L-thyroxine) 22. subjects, who report a frequent occurrence of migraine attacks Administrative reasons 23. subjects suspected or known not to follow instructions 24. subjects who are unable to understand the written and verbal instructions, in particular regarding the risks and inconveniences they will be exposed to as a result of their participation in the study -