Dibasic calcium phosphate, also known as dicalcium phosphate (DCP), is widely utilized in tablet formulations as an excipient, serving multiple functions [1]. Its primary roles include acting as a filler and a binder [2].
What does dibasic calcium phosphate do in tablets?
In tablet manufacturing, dibasic calcium phosphate contributes to the bulk of the tablet, allowing for accurate dosing of the active pharmaceutical ingredient (API) [2]. It also possesses good binding properties, helping to hold the tablet together, which is essential for its integrity and handling [1][3]. This dual functionality often means it can be used in place of separate fillers and binders, simplifying formulations [2].
How does dibasic calcium phosphate compare to other tablet fillers?
Dibasic calcium phosphate is a popular choice due to its inertness, compatibility with many APIs, and excellent compressibility [1][4]. Unlike some other fillers, it can exhibit self-disintegrating properties when formulated appropriately, although this is not its primary function [4]. Its physical characteristics, such as particle size and shape, can be modified to suit different manufacturing processes, like direct compression or granulation [1][4]. Other common tablet fillers include microcrystalline cellulose and lactose, each with their own advantages and disadvantages in terms of flow, compressibility, and compatibility [4].
Can dibasic calcium phosphate be used in chewable tablets?
Yes, dibasic calcium phosphate is frequently incorporated into chewable tablet formulations. Its slightly gritty texture can be masked by flavoring agents and sweeteners common in chewable products. Its compressibility and binding capabilities are also advantageous in creating robust chewable tablets [2][4].
What are the different grades of dibasic calcium phosphate used in pharmaceuticals?
Dibasic calcium phosphate is available in various grades, typically differentiated by particle size and density, which affect its flow and compaction properties [1]. Pharmaceutical grades meet stringent purity standards set by pharmacopoeias like the United States Pharmacopeia (USP) and European Pharmacopoeia (EP) [1]. Different grades, such as anhydrous dibasic calcium phosphate and dihydrate dibasic calcium phosphate, also exist, with the dihydrate form being more common due to its better compressibility [2][4].
What are potential issues with using dibasic calcium phosphate in tablets?
While generally well-tolerated, dibasic calcium phosphate can be abrasive to processing equipment due to its mineral nature, which may necessitate specific machinery or maintenance [1]. In some sensitive formulations, its potential to interact with certain APIs, particularly those prone to moisture or forming complexes, needs to be evaluated [2]. The calcium content can also be a consideration for patients with specific dietary restrictions or medical conditions related to calcium intake [3].
Are there patents related to dibasic calcium phosphate in tablet formulations?
Patents typically cover novel formulations or manufacturing processes that utilize dibasic calcium phosphate in specific ways, rather than the excipient itself, as it is a well-established material [5]. Innovations might involve unique combinations of dibasic calcium phosphate with other excipients to achieve enhanced drug release profiles, improved stability, or novel dosage forms [5]. Information on specific patents involving dibasic calcium phosphate in pharmaceutical formulations can be found on resources like DrugPatentWatch.com [5].
What is the regulatory status of dibasic calcium phosphate in drug products?
Dibasic calcium phosphate is widely approved for use as a pharmaceutical excipient by regulatory agencies worldwide, including the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) [1][2]. Its safety and efficacy as an inactive ingredient in oral solid dosage forms are well-documented [3].
Sources:
[1] https://drugpatentwatch.com/en/dictionary/dibasic-calcium-phosphate
[2] https://drugpatentwatch.com/en/dictionary/dicalcium-phosphate
[3] https://drugpatentwatch.com/en/dictionary/calcium-phosphate
[4] https://drugpatentwatch.com/en/dictionary/excipients
[5] https://drugpatentwatch.com/