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Intrauterine Drug Delivery Systems01:21

Intrauterine Drug Delivery Systems

Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...
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Parenteral drug delivery systems play a crucial role in modern therapeutics by enabling the direct administration of drugs into the systemic circulation, bypassing the gastrointestinal tract. These systems are particularly valuable for poorly absorbed oral medications that are unstable in the digestive environment or require rapid onset or sustained therapeutic levels. Delivery is achieved through intravenous, intramuscular, or subcutaneous routes, each selected based on the drug's properties...
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The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
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Insulin Formulations: Types and Delivery01:27

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Updated: Jun 14, 2026

Intracameral Injection in Rats with Low Risk of Adverse Effects
06:19

Intracameral Injection in Rats with Low Risk of Adverse Effects

Published on: May 31, 2024

Injectable contraception.

Geneviève Roy1

  • 1Department of Obstetrics and Gynecology, University of Montreal, Montréal, Québec, Canada. genipou14@hotmail.com

Seminars in Reproductive Medicine
|March 31, 2010
PubMed
Summary
This summary is machine-generated.

Depot medroxyprogesterone acetate (DMPA) is an effective injectable contraceptive. While DMPA use causes a reversible decrease in bone mineral density, comparable to pregnancy, the risk of future fractures is likely minimal.

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Last Updated: Jun 14, 2026

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Area of Science:

  • Reproductive Health
  • Endocrinology
  • Bone Metabolism

Background:

  • Injectable contraception, including depot medroxyprogesterone acetate (DMPA), is a widely used, highly effective birth control method.
  • DMPA's efficacy is not dependent on daily adherence or timing around intercourse.
  • Concerns exist regarding DMPA's impact on bone mineral density (BMD).

Purpose of the Study:

  • To review current evidence on the efficacy, risks, and benefits of DMPA.
  • To focus on the effects of DMPA on bone health.
  • To assess the potential long-term risks associated with DMPA-induced BMD changes.

Main Methods:

  • Review of recent scientific literature and clinical evidence.
  • Analysis of studies investigating DMPA's impact on bone mineral density.
  • Evaluation of comparative BMD changes during DMPA use, pregnancy, and breastfeeding.

Main Results:

  • DMPA use is associated with a decrease in BMD, which is generally reversible.
  • The magnitude of BMD loss with DMPA is comparable to that experienced during pregnancy and breastfeeding.
  • Limited data exists on the long-term fracture risk associated with DMPA-induced BMD loss.

Conclusions:

  • DMPA is a highly efficacious and well-tolerated injectable contraceptive.
  • The bone mineral density decrease associated with DMPA is largely reversible.
  • The risk of osteoporotic fractures due to DMPA use is likely small, given the reversibility and magnitude of BMD changes.