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Drug Delivery: Miscellaneous Routes01:22

Drug Delivery: Miscellaneous Routes

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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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Ameliorating Osteoarthritis in Mice Using Silver Nanoparticles
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Injectable medications for osteoarthritis.

Farah Hameed1, Joseph Ihm

  • 1Department of Physical Medicine and Rehabilitation, Rehabilitation Institute of Chicago, Chicago, IL 60611, USA.

PM & R : the Journal of Injury, Function, and Rehabilitation
|May 29, 2012
PubMed
Summary

Intra-articular injections like corticosteroids and hyaluronic acid offer symptomatic relief for osteoarthritis. However, their effectiveness is often comparable to placebo, and image guidance can improve injection accuracy.

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Area of Science:

  • Orthopedics
  • Rheumatology
  • Pain Management

Background:

  • Osteoarthritis is a prevalent chronic condition impacting the U.S. population.
  • Intra-articular injections are a common nonoperative treatment for symptomatic osteoarthritis.
  • Common injectables include corticosteroids, hyaluronic acid, and botulinum toxin.

Purpose of the Study:

  • To review the efficacy and mechanisms of common intra-articular injectable treatments for osteoarthritis.
  • To highlight the importance of considering the placebo effect in treatment outcomes.
  • To discuss the role of image guidance in improving injection accuracy.

Main Methods:

  • Review of existing literature on intra-articular injections for osteoarthritis.
  • Analysis of proposed mechanisms of action for corticosteroids, hyaluronic acid, and botulinum toxin.
  • Discussion of adverse effects and the placebo effect.

Main Results:

  • Corticosteroids provide anti-inflammatory and antinociceptive effects, reducing pain for up to 3 weeks.
  • Hyaluronic acid's efficacy is modest, with benefits observed between 5 and 13 weeks post-treatment.
  • The placebo effect significantly influences pain relief outcomes for these injections.

Conclusions:

  • Intra-articular injections offer various mechanisms for osteoarthritis symptom management.
  • The placebo effect is a significant factor, and outcomes should be compared against it.
  • Image guidance (ultrasound, fluoroscopy) may enhance accurate medication delivery.