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The effects of Ambilhar (niridazole or nitrothiazole) on the calcium, magnesium and phosphorus contents of various tissues of rabbits were studied. It results in a decrease in the calcium content of bones, liver and muscles. A similar depletion of the magnesium content of brain, blood, liver and muscles was observed. On the other hand, the urinary excretion of calcium and magnesium was increased. These facts indicate that the drug possibly chelates with these divalent cations. This is supported by the ultra violet spectra of the complexes prepared in vitro. The effect of Ambilhar on tissue phosphorus seems to be indirect. The phorphorus contents of both blood and urine are decreased. This could be due to an increased calcium concentration. These findings may explain the toxic effects of Ambilhar on the nervous system.


T M Al-Khayat, A Aziz, N N Izzat, M Salah. Chelation of ambilhar with calcium and magnesium. Journal of clinical chemistry and clinical biochemistry. Zeitschrift für klinische Chemie und klinische Biochemie. 1978 Jan;16(1):11-3

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PMID: 632754

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