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Case Study Of Paliperidone

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1. Introduction
The following report reviews the drug 9-hydroxyrisperidone official name Paliperidone which is sold under the brand name Invega. It is also sold as a long lasting injectable (Paliperidone Palmitate) sold under the brand name Invega Sustenna and Xeplion in Europe. An examination is made on the Pharmacology information, its application in medicine, the manufacturing of the API and the side effects on the human body.
Paliperidone is available in an injection or tablet form. Paliperidone is a dopamine antagonist and is classified as a long lasting antipsychotic medication

Fig. 1
The above chart displays the trend of sales information in blue and the number of units sold in green for the second, third and fourth quarter of …show more content…

The over coat will dissolve quickly in the gastrointestinal tract. Water is then absorbed through the semipermeable membrane controlling the rate of drug delivery at a constant rate. Two orifices are drilled on each tablet using a laser. The hydrophilic properties of the “Push Layer” create the paliperidone gel that is passed through the orifices to deliver the drug.
2.1 Manufacturing Company
Janssen Pharmaceutica is a subrsidrey of Johnson and Johnson. The company employes over 35,000 people and manufacturers pharmaceuticals for Diabetes, HIV, Alzimhers and Cancer related illness. The main research areas focus on Oncology, neuroscience, immunology, infectious diseases, cardiovascular, metabolism and vaccines (Year 2015). Janssen has operations in more the 150 countries
2.2. History
Invega was first released in 2006 for the treatment of Schizophrenia in the United states of America. In 2011 Invega was approved for sale as a treatment for schizophrenia in Europe marketed as Xeplion. On the 31st of July 2009 Invega was approved for the treatment of Schizoaffective disorder with the patent expiring on the 29th of August …show more content…

2 Chemical Structure of Paliperidone.

IUPCA name is “3-[2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl]-9-hydroxy-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one”.
The molecular formula is C23H27FN4O3 and has a molar mass of 426.5 g/mol. The boiling point is 179.8 degrees Celsius with a solubility in water 48.6 mg/L at 25 degrees. The API Paliperidone is in its pure form.
6. Crystallization Properties
e. crystallization properties of the API including description of polymorphs and solvates, rystal shape, crystallization behaviour, and the crystallization process (Kaduk et al., 2016)
Please refer to the above diagram for reference. The hydrogen bond between the hydroxyl group 031-H58 and the ketone oxygen O25 is the only significant hydrogen bond in the crystal structure. There is also a very weak intermolecular hydrogen bond between C25-H50 and F7 which has been attributed to the packing of the Paliperidone crystal. Another weak intramolecular hydrogen bond C30-H57 and O25 has been attributed to the conformation of the molecule. Paliperdone is not a tightly packed molecule and only close contacts are the O-H…O hydrogen bonds which are indicated in red in the above

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