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Glycerophosphate Is Interchangeable With Inorganic Phosphate In Terms Of Safety And Serum Pharmacokinetics | 8230
ISSN: 0975-0851

Journal of Bioequivalence & Bioavailability
Open Access

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Glycerophosphate is interchangeable with inorganic phosphate in terms of safety and serum pharmacokinetics

2nd World Congress on Bioavailability & Bioequivalence: Pharmaceutical R & D Summit-2011 and International Conference on Pharmaceutics & Novel Drug Delivery Systems

Christian Joukhadar

ScientificTracks Abstracts: JBB

DOI: 10.4172/2153-2435.10000S4

Abstract
P hosphorus is an essential element, which is mainly distributed throughout the body in the form of phosphate. Imbalances and clinically relevant disturbances in the phosphate homeostasis may be observed in association with kidney diseases, alterations in the acid?base balance or dietary intake and other disorders linked to substantial phosphate loss or inadequate uptake. Usually, mild to moderate hypophosphatemia is well tolerated, but more severe disturbances may be encountered with severe untoward clinical symptoms like muscle pain or weakness, nausea, diarrhea, constipation, hyperventilation, confusion or changes in mental state, irritable behavior, and many others. Th e aggressive replacement of phosphate in patients presenting with hypophosphatemia is unnecessary in most cases. However, for ventilated subjects with moderate levels of phosphate in serum, for patients with severe hypophosphatemia (<0.3 mmoL/L), and for cancer- or critically ill patients requiring total parenteral nutrition (TPN) for extended periods, the intravenous supplementation of phosphate can be of signifi cant importance. In these subjects, hypophosphatemia is easily overcome by use of phosphorus additives either as inorganic sodium phosphate or glycerophosphate. While TPN solutions are frequently enriched with pure sodium phosphate in the US, glycerophosphate is utilized in ready-to-use TPN emulsion solutions for intravenous administration in Europe. To date, however, several TPN emulsion preparations are currently not approved in the US due to the limited availability of PK- and safety data related to their sodium glycerophosphate content. Although, glycerophosphate was shown to be safe in earlier studies in critically ill and children, there is still circumstantial uncertainty about its safety and PK profi le in serum, if the drug is given in combination with essential components of TPN solutions such as amino-acids, fats, glucose and electrolytes. Against this background, we carried out the present study to measure and compare the PK profi les of inorganic phosphate in serum and urine following intravenous administration of the two investigational formulations. Additionally, total calcium, sodium, potassium in serum and urine as well as serum levels of potential surrogate markers of phosphate homeostasis such as PTH and calcitonin were compared in both treatment groups.
Biography
Dr. Joukhadar earned his M.D degree at the age of 25 years from the Medical University of Vienna. At present, he is af fi liated with the Beth Israel Deaconess Medical Center, Boston MA, and the Harvard Medical School, Boston, MA. He is also the chief executive of fi cer of J&P MEDICAL RESEARCH Ltd., an independent international research institute, basically operating according to the public-private-partnership concept. He has published more than 125 papers in highly reputed medical journals, 10 book chapters and is serving as an editorial board member in more than 7 medical or pharmaceutical peer-reviewed journals
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