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ABSORPTION OF ARSENIC FOLLOWING INTRA-MUSCULAR INJECTIONS OF SALVARSAN AND NEOSALVARSAN
1Hospital of The Rockefeller Institute for Medical Research, New York.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Intramuscular injections of salvarsan and neosalvarsan cause muscle necrosis in rabbits. Salvarsan induces a more severe reaction and slower arsenic absorption compared to neosalvarsan.
Area of Science:
- Pharmacology
- Toxicology
- Veterinary Medicine
Background:
- Salvarsan and neosalvarsan are arsenic-based compounds historically used for treating infections.
- Intramuscular administration can lead to local tissue reactions and systemic absorption of the active agent.
Purpose of the Study:
- To compare the local tissue reactions and arsenic absorption rates of salvarsan and neosalvarsan following intramuscular injection in rabbits.
Main Methods:
- Rabbits received intramuscular injections of salvarsan and neosalvarsan.
- Muscle tissue necrosis was assessed.
- Arsenic absorption was quantified over time following injections.
Main Results:
- Both salvarsan and neosalvarsan induced muscle necrosis upon intramuscular injection.
- Salvarsan produced a more intense necrotic reaction than neosalvarsan.
- Arsenic absorption from neosalvarsan was rapid (75-85% in the first week), while absorption from salvarsan was significantly slower.
Conclusions:
- Neosalvarsan demonstrates a more favorable absorption profile and less severe local tissue reaction compared to salvarsan after intramuscular administration in rabbits.
- These findings have implications for understanding the comparative pharmacokinetics and local toxicity of these arsenic compounds.
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