Intravaginal 'ring' could deliver number of women's health drugs

By Dan Stanton

- Last updated on GMT

Intravaginal ring could help prevent HIV
Intravaginal ring could help prevent HIV

Related tags: Hiv

An intravaginal ring filled with an anti-retroviral drug being developed by Northwestern University could be used to deliver drugs for a number of indications, says the Professor behind the research.

The polymer device - filled with powdered tenofovir (TDF), an anti-retroviral drug - allows a lower dose of the drug to be used than the oral form, and has demonstrated successful results in preclinical tests with primates and is soon to undergo tests in humanshuman immunodeficiency virus (SHIV).

Patrick Kiser, the Professor leading the research at Northwestern University, told in-Pharmatechnologist.com: “The design of the device is a hollow core tube that is filled with powdered drug and an osmoattractant (NaCl) that attracts vaginal fluid into the core of the device, solubilizes some of the drug and allows it to be released.

Other polymers used in IVR design are not capable of releasing TDF because the drug is not soluble in them,”​ he continued. “We use a water swellable elastomer in which the drug TDF has appreciable solubility.”

Kiser also told us the device could be used to administer other drugs. “We are designing a ring that elutes a vaginal lubricant and are working on other women's health indications like gynecological cancers, contraception and other infectious diseases of importance to women.”

There has been some interest from pharma companies interested in this technology but Kiser was unable to say more due to confidentiality reasons.

Intravaginal Benefits

For this technology, the advantage of delivery lies in “obtaining high local concentrations of antiviral agent without appreciable systemic exposure,”​ Alex Mullen - Chief Scientific Officer at Drug Delivery International (DDI) - told this publication.

However, though the intravaginal ring “has some interesting potential”​ Mullen said there are still a number of hurdles the device needs to overcome. On top of clinical trials and possible side effects, there is also the cost to consider and whether such systems change behaviour patterns in users.

As for general benefits of administering drugs via the vagina, Mullen said the thin and permeable nature of the vaginal lining and the good blood supply offers “the opportunity to either provide local concentrations of drugs where they are needed or the potential to offer systemic delivery of drug with minimal metabolism.”

He also said DDI - who is currently developing intravaginal devices for the treatment of various obstetric diseases - is seeing demand for this type of drug delivery as woman’s health is a growing area with a number of existing treatments being inadequate.

Related news

Show more

Related products

show more

From Candidate to Clinic- European Capabilities

From Candidate to Clinic- European Capabilities

Catalent Pharma Solutions | 22-Oct-2018 | Technical / White Paper

Catalent’s Nottingham, UK facility focuses on early stage development of small molecule drug candidates from the bench to clinic. This facility offers...

Fill Release at the Right Time in the Right Place

Fill Release at the Right Time in the Right Place

Gelita AG | 19-Sep-2018 | Technical / White Paper

From rapid release in the stomach for e.g. analgesics to enteric release for fills with unpleasant aftertaste – GELITA delivers the respective gelatine...

Strategies to Select and Deliver the Right Candidate

Strategies to Select and Deliver the Right Candidate

Catalent Pharma Solutions | 05-Mar-2018 | Technical / White Paper

Does your candidate have what it takes to succeed? Do you have the information needed to make the right decisions about your candidate’s path to the clinic?...

Related suppliers