Magnetic Marker Monitoring of Furosemide-containing Gastroretentive Formulation in Healthy Male Subjects (Fasting and Fed Conditions)

Oedema Clinical Trial

Official title:

Characterisation of Gastric Residence of a Furosemide-containing New Gastric Retention System by Means of MMM Measurement and Determination of Pharmacokinetics, Pharmacodynamics and Safety

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01887379
• Other study ID #: LTS 03/10
• Secondary ID: 2013-001063-23
• Status: Completed
• Phase: Phase 1
• First received: June 24, 2013
• Last updated: December 11, 2013
• Start date: June 2013
• Est. completion date: August 2013

Study information

• Verified date: December 2013
• Source: LTS Lohmann Therapie-Systeme AG
• Contact: n/a
• Is FDA regulated: No
• Health authority: Germany: Federal Institute for Drugs and Medical Devices
• Study type: Interventional

Clinical Trial Summary

Furosemide is a diuretic drug, used in the treatment of oedematous states associated with cardiac, renal, and hepatic disorder, and may be effective in patients unresponsive to thiazide diuretics. Furosemide is also used in the treatment of hypertension.

Absorption of furosemide from the gastrointestinal tract is fairly rapid; bioavailability is 60-70%, but variable and not predictable, with large intra- and inter-individual variability, and are influenced by dosage form, underlying diseases, and by the presence of food after oral administration. Data from animal model show that furosemide administered into the stomach is more rapidly absorbed than if is administered into the small intestine.

To increase the residency of furosemide in the stomach after oral administration, a gastroretentive dosage form (GRDF) of furosemide has been developed. In the current study, the new formulation (30mg furosemide coated tablet) will be tested in healthy male subjects. Absorption will be characterised by an effective and safe imaging technique - Magnetic Marker Monitoring (MMM), based on Fe3O4 added to the drug product to generate magnetic signal that can be used for up to 12 h after furosemide administration to localize the medication in the gastrointestinal tract. Fe3O4 is frequently used as colouring pigment in medicinal products. It does not exhibit own pharmacodynamic activity and is considered as an inactive ingredient.

In the current study, GRDF formulation of furosemide will be evaluated for: gastric residence as well as pharmacokinetic and pharmacodynamic characteristics under fasting and fed conditions. As part of the study, the subjects will be hospitalized for 1 day during each drug administration. The duration of the stay will depend on the intestinal behaviour of the investigational product.

Description:

Furosemide is a diuretic drug, widely used in the treatment of oedematous states associated with cardiac, renal, and hepatic disorder, and may be effective in patients unresponsive to thiazide diuretics. Furosemide is also used in the treatment of hypertension.

Absorption of furosemide from the gastrointestinal tract is fairly rapid. Bioavailability is reported as 60-70%, but is variable and not predictable. The rate and extent of absorption show a large intra- and inter-individual variability and are influenced by dosage form, underlying diseases, and by the presence of food after oral administration. Results obtained with an animal model indicate that furosemide administered into the stomach is more rapidly absorbed than if is is administered into the small intestine.

To increase the residency of furosemide in the stomach after oral administration, a gastroretentive dosage form (GRDF) of furosemide has been developed. In this study, the new formulation(30mg furosemide coated tablet) will be tested in healthy male subjects. Absorption will be characterised by imaging technique - Magnetic Marker Monitoring (MMM), which is the most effective and safe imaging technique currently available. MMM is based on a iron-III-oxide (Fe3O4) added to the drug product to generate magnetic signal that can be used to localize the administered medication in the gastrointestinal tract.

Fe3O4 is frequently used as colouring pigment in medicinal products. It does not exhibit own pharmacodynamic activity and thus, it is considered as clinically inactive ingredient. Fe3O4 exhibits a dipole moment and thus, after magnetisation of solid oral dosage forms containing homogenously distributed Fe3O4, the product generates a magnetic signal, which can be used for localisation of the dosage form in the gastrointestinal tract by Magnetic Marker Monitoring technique.

The aim of the current study is to evaluate the GRDF formulation of furosemide for: gastric residence, pharmacokinetic and pharmacodynamic characteristics under fasting and fed conditions. As part of the study, the subjects will be hospitalized for 1 day during each drug administration (i.e. a total of two days). The duration of the stay will depend on the intestinal behaviour of the investigational product. The MMM monitoring be performed for up to 12 h after furosemide administration. For pharmacokinetic determinations, liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) will be used to analyze furosemide in plasma.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10
• Est. completion date: August 2013
• Est. primary completion date: August 2013
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 55 Years

Eligibility

Inclusion Criteria:

1. sex: male

2. ethnic origin: Caucasian

3. age: 18 years to 55 years

4. body-mass index (BMI): > or = 19 kg/m² and < or = 27 kg/m²

5. good state of health

6. non-smoker or ex-smoker for at least 1 month

7. written informed consent, after having been informed about benefits and potential risks of the clinical trial, as well as details of the insurance taken out to cover the subjects participating in the clinical trial

Exclusion Criteria:

1. existing cardiac and/or haematological diseases or pathological findings, which might interfere with the safety or tolerability of the active ingredient

2. existing hepatic and/or renal diseases or pathological findings, which might interfere with the safety or tolerability of the active ingredient

3. existing gastrointestinal diseases or pathological findings, which might interfere with the safety and tolerability or with gastric emptying and the gastrointestinal transport (e.g. inflammatory bowel diseases, ileus)

4. history of relevant central nervous system (CNS) and/or psychiatric disorders and/or currently treated CNS and/or psychiatric disorders

5. any surgery at the gastrointestinal tract, which might interfere with the safety of the test product or any stomach reduction like Bioenterics Intragastric Balloon (BIB) or gastric banding

6. known allergic reactions to the active ingredients used or to constituents of the pharmaceutical preparations

7. known allergic reactions to sulphonamide

8. subjects with severe allergies or multiple drug allergies unless it is judged as not relevant for the clinical trial by the investigator

9. heart rate < 50 bpm or > 90 bpm

10. systolic blood pressure of < 100 mmHg and > 140 mmHg, diastolic blood pressure of < 60 mmHg and >90 mmHg

11. laboratory values, especially for sodium, potassium, calcium, creatinine, urea, uric acid, and blood glucose out of normal range unless the deviation from normal is judged as not relevant for the clinical trial by the investigator

12. positive anti-human immunodeficiency virus-test (if positive to be verified by western blot), surface antigen of the hepatitis B virus (HBs-AG)test [if positive to be verified by test for hepatitis B Core (HBc-IgM)] or anti-hepatitis C virus-test

13. renal failure with anuria

14. coma and praecoma hepatica

15. severe hypokalemia and/or hyponatremia

16. hypovolemia or dehydration

17. subjects with manifest or latent diabetes mellitus or gout

18. subjects with cerebrovascular insufficiency or coronary heart disease

19. subjects with bladder outlet obstruction (BOO) e.g. prostatic hypertrophy, hydronephrosis or ureteral stenosis

20. hypoproteinemia

21. liver cirrhosis and simultaneous limitation of kidney function

22. acute or chronic diseases which could affect gastric emptying and the gastrointestinal transport

23. history of or current drug or alcohol dependence

24. positive alcohol or drug test at screening examination

25. regular intake of alcoholic food or beverages of = 40 g pure ethanol for male per day

26. subjects who are on a diet which could affect gastric emptying and the gastro-intestinal transport

27. regular intake of caffeine containing food or beverages of = 500 mg caffeine per day

28. subjects with claustrophobia

29. ferromagnetic implants or any other magnetic disturbance, which can affect the Magnetic Marker Monitoring measurement

30. blood donation or other blood loss of more than 400 ml within the last two months prior to individual enrolment of the subject

31. participation in a clinical trial during the last two months prior to individual enrolment of the subject

32. regular treatment with any systemically available medication including all ototoxic medication like aminoglycosides and medication which could affect gastric emptying and the gastrointestinal transport (e.g. laxatives, metoclopramide, loperamide, antacids, H2-receptor antagonists) or antibiotics

33. subjects, who report a frequent occurrence of migraine attacks

34. subjects suspected or known not to follow instructions

35. subjects who are unable to understand the written and verbal instructions, in particular regarding the risks and inconveniences they will be exposed to during their participation in the clinical trial

36. subjects who have forfeited their own freedom by administrative or legal award, or who are under guardianship or have been admitted in a sanitary or social institution

Study Design

Allocation: Randomized, Endpoint Classification: Pharmacokinetics/Dynamics Study, Intervention Model: Crossover Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Gastroretentive Drug Formulation of Furosemide
• Oedema

Intervention

Drug:
• GRDF furosemide
The GRDF furosemide tablet contains Fe3O4, which serves as an inactive magnetic marker to allow monitoring of the tablet transit through the gastrointestinal tract, using the MMM imaging technique.

Locations

Country	Name	City	State
Germany	SocraTec R&D GmbH Clinical Pharmacology Unit	Berlin

Sponsors (1)

Lead Sponsor	Collaborator
LTS Lohmann Therapie-Systeme AG

Country where clinical trial is conducted

Germany, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Residency time of GRDF furosemide in the gastrointestinal tract, evaluated with MMM technique, under fasted and fed conditions.	Residency time of GRDF furosemide in the gastrointestinal track will be monitored using the non-invasive MMM technique under fasted and fed conditions. Measurements will start after each administration and last until 2 hours after gastric emptying indicated by the MMM measurement, but not longer than 12 h post administration. Each observation interval for each subject will last for a minimum of 10 min followed by a break of maximum 20 min. For meal intake, a break of the MMM measuring of 30 minutes will be performed.; Anatomical localisation within the measuring sequences will be listed for each subject and treatment; Statistical evaluation of gastric emptying time will include: arithmetic means, medians, minimum , maximum, standard deviation.; GRDF=Gastro retentive dosage formulation	every 30 min for up to 12 h after drug administration; maximal observation time 12 h	No
Secondary	Cmax of GRDF furosemide under fasted conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; Cmax = maximum concentration in plasma; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	Cmax of GRDF furosemide under fed conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; Cmax = maximum concentration in plasma; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	tmax of GRDF furosemide under fasted conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; tmax = time to reach maximum concentration in plasma; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	tmax of GRDF furosemide under fed conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; tmax = time to reach maximum concentration in plasma; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	t1/2 of GRDF furosemide under fasted conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; t1/2 = apparent terminal elimination half-life; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	t1/2 of GRDF furosemide under fed conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; t1/2 = apparent terminal elimination half-life; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	AUC0-tlast of GRDF furosemide under fasted conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; AUC0 = area under the plasma concentration vs. time curve from dosing time to the last measurement time point with a concentration value above the lower limit of quantitation, calculated by means of the linear up/log down method (linear trapezoidal rule for increases in concentration/logarithmic trapezoidal rule for decreases in concentrations; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	AUC0-tlast of GRDF furosemide under fed conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; AUC0-tlast = area under the plasma concentration vs. time curve from dosing time to the last measurement time point with a concentration value above the lower limit of quantitation, calculated by means of the linear up/log down method (linear trapezoidal rule for increases in concentration/logarithmic trapezoidal rule for decreases in concentrations; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	AUC 0-infinity of GRDF furosemide under fasted conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; AUC0-infinity = AUC0-tlast + AUCexpol; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	AUC 0-infinity of GRDF furosemide under fed conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; AUC0-infinity = AUC0-tlast + AUCexpol; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	AUCextrapol of GRDF furosemide under fasted conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; AUCextrapol = AUCextrapolated = Clast/lamda; lamda = apparent terminal elimination rate constant determined by log-linear regression; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	AUCextrapol of GRDF furosemide under fed conditions	Characterization of the pharmacokinetic (PK) properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; AUCextrapol = AUCextrapolated = Clast/lamda; lamda = apparent terminal elimination rate constant determined by log-linear regression; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	CL_f of GRDF furosemide under fasted conditions	Characterization of the pharmacodynamic properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; CL_f = apparent total body clearance of furosemide: dose / AUC0-8; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	CL_f of GRDF furosemide under fed conditions	Characterization of the pharmacodynamic properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; CL_f = apparent total body clearance of furosemide: dose / AUC0-8; GRDF=Gastro retentive dosage formulation	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	Vdz of GRDF furosemide under fasted conditions	Characterization of the pharmacodynamic properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; Vdz = apparent volume of distribution of furosemide: dose / (AUC0-8 x ?); GRDF=Gastro retentive dosage formulation; ?=apparent terminal elimination rate constant determined by log-linear regression	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	Vdz of GRDF furosemide under fed conditions	Characterization of the pharmacodynamic properties of GRDF furosemide, with special focus on the absorption phase of furosemide. Compare results during fasted and fed state.; Blood samples for the determination of furosemide concentration will be taken at pre-dose (within 1 h prior to administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after administration.; LC-MS/MS will be used to analyze furosemide in plasma.; Vdz = apparent volume of distribution of furosemide: dose / (AUC0-8 x ?); GRDF=Gastro retentive dosage formulation; ?=apparent terminal elimination rate constant determined by log-linear regression	pre-dose (within 1 h prior to drug administration) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, and 24 h after drug administration.	No
Secondary	Sodium excretion over time under fasted conditions	Sodium in urine will be measured for each time interval and total sampling time. Urine will be collected and sampled during the following sample intervals: pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	No
Secondary	Sodium excretion over time under fed conditions	Sodium in urine will be measured for each time interval and total sampling time. Urine will be collected and sampled during the following sample intervals: pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	No
Secondary	Urine excretion over time under fasted conditions	Urine volume will be measured for each time interval and total sampling time. Urine will be collected and sampled during the following sample intervals: pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	No
Secondary	Urine excretion over time under fed conditions	Urine volume will be measured for each time interval and total sampling time. Urine will be collected and sampled during the following sample intervals: pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	pre-dose (within 1 hour prior to administration), 0-2h, 2-4h, 4-8h, and 8-12h after administration.	No