Bioavailability Of Flucloxacillin Capsules (250 mg and 500 mg)

Primary objective:To study the absolute bioavailability, distribution and elimination parameters of flucloxacillin from two oral formulations of flucloxacillin in healthy male and/or female subjects.

A mono-center, open, randomized, three-way, twelve-sequence, cross-over study to determine the extent of absorption (absolute bioavailability), rate of absorption and to further characterize distribution and elimination characteristics of a commercial 250 mg and a 500 mg capsule of flucloxacillin each given as a single oral dose vs. one 250 or 500 mg intravenous dose to 24 healthy male and/or female subjects in the fasting state

Eligibility Criteria:
Inclusion Criteria:

* Healthy volunteers,
* Caucasians,
* Body Mass Index (BMI) between 19 and 27 kg/m 2;
* physically and mentally healthy as judged by means of a medical and standard lab examination;
* non-smokers,
* ex-smokers or moderate smoker.

Exclusion criteria:

* medical history,
* vital signs,
* physical examination,laboratory tests (blood and/or urine) with evidence of clinically significant conditions;
* 12-lead electrocardiogram (ECG) with clinically significant abnormality;acute infection within 2 weeks preceding 1st study drug administration;any medication on a regular basis (exception females: oral contraceptives) and/or tricyclic antidepressants, antacids, histamine H2-receptor antagonists, antibiotics,
* non steroid anti-inflammatory drugs or anticoagulants within 8 weeks before the 1st study drug administration and/or no agreement to take any of those drugs including Over-the-counter (OTC) drugs until the end of the follow- up examination;
* no agreement not to take any medication,including OTC medicine, antacids, or analgesics within 2 weeks before 1st drug administration until the end of the follow-up examination;special diet or loss of \> 5 kg within last month from a weight reduction diet; regularly consume of large quantities of alcohol (\> 20g/day) and/or beverages containing methylxanthines e.g. caffeine (\> 0.5L/day altogether);
* no agreement not to consume: - any beverages or foods containing alcohol 48 h prior to 1st study drug administration until end of the follow-up examination;
* any grapefruit products 7 days prior 1st study drug administration until end of the follow-up examination,
* any beverages or foods containing methylxanthines as well as fruit-juices and any foods containing poppy seed 48 h before 1st drug administration of either study period until last blood sample of the respective study period was collected,
* not to consume chewing during confinement;
* history of: - allergy to flucloxacillin,
* B-lactams and/or related drugs,
* known hypersensitivity against the inactive ingredients of the study medication,
* hypersensitivity to multiple drugs,
* allergic diseases,
* acute hay fever,
* previous history of flucloxacillin-associated jaundice/hepatic dysfunction,
* alcohol or drug abuse,
* epilepsy or other seizure,
* psychiatric illness, e.g. latent or manifest depression schizophrenia, or neurosis,
* respiratory diseases,
* surgery of the gastrointestinal tract (except appendectomy),
* kidney diseases,
* bleeding/coagulation disorder or severe anaemia,
* glucose-6-phosphate dehydrogenase deficiency and/or chronic treatment or chronic pathology;
* metabolic disease;
* evidence for disorder in the metabolism of pharmaceuticals or other foreign compounds; cardiovascular diseases e.g. hypertension, hypotension or bradycardia;
* associated disease that would interfere with the clinical course of the trial;
* major illness during 3 month before commencement of the screening period,
* gastrointestinal diseases;
* reported or positive results from test of drugs of abuse (amphetamines, opiates, barbiturate, methadone, cannabinoids, cocaine, benzodiazepines);
* Positive test for: alcohol, Hepatitis-B-antigen or Hepatitis-C-antibody, HIV-antibody;blood donor or blood loss including plasmapheresis within the last 3 months before the 1st study drug administration;
* intake of depot injectable solutions (including study medication) within 6 month before 1st study administration;
* intake of enzyme-inducing and/or organotoxic drugs within 4 weeks before 1st study drug administration;for females only: positive results from pregnancy tests;does not use or not agree to use adequate contraceptive methods during the study;
* lactating woman.