AAPS PharmSciTech

, 9:1078 | Cite as

Carbopol-Based Gels for Nasal Delivery of Progesterone

  • Grace Rathnam
  • N. Narayanan
  • R. Ilavarasan
Research Article


The purpose of this study was to investigate the nasal absorption of progesterone from carbopol-based nasal gels in rabbits. Progesterone nasal gels were prepared by dispersing carbopol 974 (1%, 1.5%, and 2%) in distilled water followed by addition of progesterone/progesterone–β cyclodextrin complex dissolved in propylene glycol then neutralization. The potential use of β cyclodextrin (CD) as nasal absorption enhancer by simple addition, as a physical mixture and as a complex with progesterone was investigated. The absolute bioavailability of progesterone from nasal gels in rabbits was studied by estimating the serum progesterone level by competitive solid-phase enzyme immunoassay in comparison to intravenous injection. The carbopol gel formulations produced a significant increase in bioavailability. CD complex promotes the nasal absorption of progesterone from carbopol gels as compared with gels where the CD is added by simple addition and gels which do not contain CD. This method of addition of CD as an inclusion complex in the gels could be considered as a preferred platform in nasal drug administration.

Key words

cyclodextrins gels nasal delivery progesterone 


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Copyright information

© American Association of Pharmaceutical Scientists 2008

Authors and Affiliations

  1. 1.Department of PharmaceuticsC.L. Baid Metha College of Pharmacy, ThorapakkamChennaiIndia
  2. 2.Department of PharmaceuticsMadras Medical CollegeChennaiIndia
  3. 3.Captain Srinivas Murthi Drug ResearchInstitute for Ayurveda and Siddha, ArumbakkamChennaiIndia

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