ReportDrug Delivery

A once-a-month oral contraceptive

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Science Translational Medicine  04 Dec 2019:
Vol. 11, Issue 521, eaay2602
DOI: 10.1126/scitranslmed.aay2602

When less is more

Reducing the frequency at which a patient must take a medication can improve patient adherence. Kirtane et al. developed an ingestible gastric resident dosage form that releases the contraceptive levonorgestrel. Levonorgestrel was detected in the serum of pigs for 1 month after oral administration of a single dose. These preliminary results demonstrate progress that is an easy pill to swallow.


Poor patient adherence to oral contraceptives is the predominant cause of failure of these therapies, leading to unplanned pregnancies that can negatively affect female health worldwide. To improve patient adherence, we developed an oral contraceptive that is administered once a month. Here, we describe the design and report in vivo characterization of a levonorgestrel-releasing gastric resident dosage form in pigs.

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