COVID-19 is currently regarded as a lethal disease. COVID-19 has exaggerated over 2.5 million citizen’s universal, consequential into more than 170,000 confirmed cases deaths Very recently a novel corona virus, SARS-CoV-2, was identified because of causal cause of an outbreak of viral pneumonia centered around Wuhan, Hubei, China in Dec 2019, now called as COVID-19. The corona disease infection 2019 (Covid-19) (2019-nCoV) pandemic is an international public health emergency with major social and economic disruptions and devastating health consequences. COVID-19 is also known as a pandemic. COVID-19 has infected over 2.5 million people around the world, resulting in over 170,000 deaths. The rapid development of vaccines is imperative. Corona viruses are a group of related RNA viruses that cause diseases in mammals and birds. It triggers breathing zones that can vary from moderate to fatal in humans and birds more than a few issues to ordinary frosty (so as to can also be affected via different pathogens, mostly rhinoviruses) are mild, while more deadly strains be able to reason SARS, MERS, and COVID-19 in humans. Thousands of illnesses and deaths have occurred as a result of the disease. In fact, none exact cure remains available for the disorder yet this demands that even the condition should not expand. Notable Isolation of sick people, adequate ventilation, hand washing, and the utilization of PPE Kit are also preventive measures. As a result, this paper covers all aspects of COVID-19, including epidemiology, transmission, clinical characteristics, diagnosis, treatment, and prevention.

The main purpose of this research work was to design and process optimization of oral floating drug delivery system of Clarithromycin floating tablets by using the hydrophilic polymer Hydroxylpropyl methyl cellulose and gas generating agent sodium bicarbonate and citric acid. A 32 randomized full factorial design was used to study. In this design 2 factors were evaluated, each at 3 levels and experimental trials were performed at all 9 possible combinations. The independent and dependent variables are selected for optimization study. The radio-labelled floating tablets were prepared by adding barium sulphate in the optimized formulations for in- vivo radiographic study. The Results of multiple regression analysis indicated that both factors X1 and X2 significantly affected on the dependent parameters. The formulation was optimized on the basis of floating ability and in-vitro drug release. It should be concluded that as the time increases, the swelling index was increased, because weight gain by tablet was increased proportionally with rate of hydration. In-vivo radiographic studies of the optimized formulations were performed using New Zeal Albino rabbits by X-ray imaging technique. The in-vivo X-ray imaging and radiographic studies clearly indicated that the prepared optimized floating tablets were retained in the rabbit stomach over a prolonged period of time and had good in-vivo performance. Radiological evidences suggest that the formulated floating tablets of antibiotics were well floated more than 6 h in rabbit stomach.

Mini Tablets are solid dosage forms with a diameter <= 3 mm and separated into subunits of conventional tablets. Production methods are similar to standard tablets, but the only difference is the use of multiple punches. They have advantageous for use in patients suffering from swallowing difficulty and receiving multiple drug treatment. They provide a more effective treatment by reducing the fluctuation in the drug’s release profile. At the same time, different release systems can be used together. In addition, Mini Tablets have a number of advantages over single unit dosage forms, and in recent years the prominence continues to increase. In the light of this information, the advantages and disadvantages of mini tablets, production equipment, formulation designs, different emission characteristics and evaluation criteria are emphasized in this compilation. Mini tablets represent a new trend in solid dosage form design, with the main goal of overcoming some therapeutic obstacles. Mini tablets are multiple unit dosage forms and are advantageous than pellets or any other oral dosage forms as they are easy to manufacture and stability problems are less.