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Cross-over Study to Prove Bioequivalence Between Two Oral Formulations of Levonorgestrel

Open-label, Randomized, Crossover Study to Compare the Bioavailability of One Coated Tablet of Opxion® (Levonorgestrel 1.5 mg From Bayer de Mexico) vs. Two Tablets of Postday® (Levonorgestrel 0.75 mg From Investigacion Farmaceutica), in Healthy Volunteers

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01096485
Acronym
LEVEQ-1
Enrollment
24
Registered
2010-03-31
Start date
2009-02-28
Completion date
2009-03-31
Last updated
2013-06-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Contraception, Contraception, Postcoital

Brief summary

A single dose, two treatments (Postday and Opxion), two periods, two sequences, crossover, randomized, prospective design was chosen with a washout of 21 days between the two study periods. Treatment groups were balanced with the same number of male healthy volunteers who were randomly assigned to the study drug administration sequences.

Interventions

Single dose of 1.5 mg coated tablet

Single dose of two 0.75 mg tablets

Sponsors

Bayer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

* Healthy male volunteers age between 18 and 55 years old with normal vital signs, electrocardiogram (ECG), blood chemistry, liver function profile and urinalysis.

Exclusion criteria

* History of illnesses or any organic abnormalities that could affect the results of the study. * History of abuse tobacco or alcohol or regular use of recreational or therapeutic drugs. * Subjects that have taken any medication within 14 days or that are in an elimination period of less than 7 half-lives (whichever is longest) before study startup.

Design outcomes

Primary

MeasureTime frame
Least square estimator of average maximum plasmatic concentration (log transformed)After 2 months
Least square estimator of area under the pharmacokinetic curve (log transformed)After 2 months

Secondary

MeasureTime frame
Clearance constant of plasmatic concentration of study drugAfter 2 months
Time at which maximum concentration is reachedAfter 2 months
Adverse events collectionUp to 8 weeks
Half life of plasmatic concentration of study drugAfter 2 months
Area under the pharmacokinetic curve from time=0 to time of last blood sampleAfter 2 months

Countries

Mexico

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026