In recent years, due to increased drug use global generic drugs in 2019, the industry generated 79 billion U.S. dollars in generic prescription drug revenue worldwide. Until 2026, the global prescribed generics market is expected to exceed 100 billion U.S. dollars.
The study of generic drugs will be based on the list of comparative products approved by the World Health Organization. The World Health Organization has approved the International List of Essential medicines of international comparator products based on the ANNEX-7 and ANNEX-8. That list includes a total of 572 international comparator products.
Generic drugs has an important role in the market of any country, and generic drugs are required to be similar to comparator products in terms of therapeutic activity, quality, and safety. In multi sources generic drug is equivalent to the treatment of the comparable product, allowing the product to be used as a substitute for analysis.
Some results of recent studies of Ibuprofen is mentioned above here.
In 2010 in Madrid, Spain, the study Investigation on the possibility of biowaivers for Ibuprofen was conducted by Covadonga Lvarez, Ignacio Nunenz, Juan J. Torrado and John Gordon. The aim of the study was to investigate the ability of in vitro dissolution to ensure bioequivalence of ibuprofen products. Ibuprofen is a Biopharmaceutics Classification System (BCS) class II drug with low solubility at pH 1.2 and 4.5 and high solubility at pH 6.8. In vivo studies were performed following the updated Declaration of Helsinki, with the approval of the Ethical Committee for Clinical Re- search of the Hospital and the Spanish Agency for Medicines and Health Care Products.
In-vitro evaluation of the pharmaceutical quality of some ibuprofen tablets dispensed in Nigeria, University of Benin, Department of Pharmaceutics and Pharmaceutical Technology, analyzed Florence E. Eichie*, Ikhuoria M. Arhewoh and Oliver C. Ezeobi. The Ibuprofen tablets were assessed according to British Pharmacopoeia (BP), and unofficial standards as recommended by the manufacturers. Of the 19 brands of tablets assessed, 12 brands passed the uniformity of content test while 15 brands passed the disintegration test and only four brands passed the dissolution test. Ibuprofen tablets dispensed in Nigeria varied considerably in their pharmaceutical quality.
In 2015 in Nigeria, Benin City, University of Benin, Department of Pharmaceutics and Pharmaceutical Technology, Studies of comparative UV−HPLC analysis of ten brands of ibuprofen tablets. Those studies investigated the pharmaceutical equivalence of ten brands of ibuprofen tablets (400 mg) purchased from pharmacies in Benin City, Nigeria. According to the results of the study, the weight of the total brand of drugs varies significantly, fluctuates between 6.14-15.93kp due to the action of pressure, and the melting point does not meet the requirements of brands B and G. Drug decomposition brands C, F, H, I meet the requirements, but the solubility indicators D, E, G, I, J inadequate requirements. Brands C and D inadequate requirements for determining the content of ibuprofen in ultraviolet light. However, all brands of drugs approved requirements for HPLC.
In 2020 in Mekelle, Ethiopia, Comparative In Vitro Quality Evaluation of Different Brands of Ibuprofen Tablets Marketed. Studies included seven brands of 400 mg lm coated ibuprofen tablets were randomly purchased from different pharmacies and drug stores in Mekelle. Weight uniformity, hardness, friability, disintegration, dissolution and assay of drug content were performed based on specications stipulated in the British Pharmacopeia (BP) and the United State Pharmacopeia (USP).
All the evaluated products of ibuprofen tablets marketed in Mekelle were within the acceptable compendial limits based on the in vitro results of the study except product IBU-E which failed in the disintegration test.
The aim of the study to determine the in vitro quality of some domestic and imported ibuprofen drugs.

Background: The aim of this study was to investigate the diameters of the bony nasolacrimal canal by computed tomography in normal adult Mongolian population and the effect of gender and age on the nasolacrimal canal diameter. Methods: Using standart tomographic images, we measured the diameters, angle between the bony canal and nasal floor and length of the bony nasolacrimal duct in 150 patients without nasolacrimal duct disease. Results: The anterioposterior diameter of the bony nasolacrimal canal was 6.49± 1.06mm, transverse diameter was 4.56±0.9mm, angle between the bony canal and nasal floor was 69.6±8.1o. No significant difference in anterioposterior diameter and transverse diameter in gender. The angle between the bony canal and nasal floor was significantly greater in male. Conclusions This study may contribute to the establishment of a detailed anatomical and morphometric baseline of the bony nasolacrimal canal and provide useful information for the planning of interventions for nasolacrimal duct obstruction

Background: Numerous studies among the western population have been demonstrated that the intolerance of uncertainty can cause mental disorders such as OCD, anxiety disorder major depressive disorder. The lack of research in this field among the eastern population, especially the Mongolians, is the basis of our study. Material and Methods The study was designed as a cross-sectional study with a self-report questionnaire and conducted between December 5th and February 5th of 2022. The Intolerance of Uncertainty scale (IUS-12) is for measuring intolerance of uncertainty, Patient health questionnaire (PHQ-9), and Generalized anxiety disorder (GAD-7) were used to measuring mental health among study participants. The present study was undertaken following ethical approval from the MNUMS scientific research ethics committee (approval number: 2021/3-06). Statistical analysis was performed using SPSS version 24. Purpose: The current study was aimed to explore the impact of intolerance of uncertainty on students’ mental health. Results: Total of 3137 students (2440 Chinese, 697 Mongolian), 65.7% of them were female students participated in the current study. The mean score of IUS-12 was 33.53±7.72 among Chinese students, while 38.65±8.48 among Mongolians. This reveals the statistically significant (p=0.003) difference intolerance level between Chinese and Mongolian students. Moreover, Chinese students were less depressed and less anxious than Mongolian students. The anxiety and depression level was directly impacted by the influence of intolerance of uncertainty. Conclusion Chinese students are more tolerant toward uncertainties than Mongolian students. The intolerance of uncertainty causes depression and anxiety, regardless of nationality.