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Drug delivery is highly innovative in terms of materials to assist delivery, excipients and technology which allows release of drugs in a manner desired for improved therapeutic efficacy, safety and patient compliance. Among many other factors cost of non-compliance alone estimated to be ca. 13 % of total healthcare expenditure per year. Providing patients with simplified oral medications that will improve compliance and thus result more effective treatment has been one of the major drivers for innovation in the oral controlled drug delivery market. In this connection the oral chewable tablets were investigated as possible alternative formulations for the delivery essential oils known to be effective for the treatment of various ailments and have been administered traditionally as aromatic waters, elixirs, or more recently in the soft gelatin capsules. Now-a-days when people are increasingly taking several products as breath freshener, the present concept to formulate these essential oils in the form of chewable dosage forms so that these can be administered for such therapeutic uses and can provide simultaneously breath freshness to consumer in view of the urban lifestyle. This paper discuss the thermal stability and drug-excipient compatibility studies of peppermint and caraway oils for formulation of chewable tablets as alternative dosage form towards improved patient compliance and market viability.

Whenever a drug's success depends on its ability to disperse evenly in the liquid phase, solubility is a critical factor. Most active pharmacological compounds, on the other hand, are poorly soluble in water. The solubility of the medications is one of the most difficult parts of formulation creation. Due to a lack of water solubility, critical ingredients are left out of final medications, preventing them from reaching their full therapeutic potential. Due to poor water solubility, many novel medicines fail to launch in the market, despite their promising pharmacokinetic properties. Solubility in water limits the potential bioavailability of molecules that would otherwise have a significant impact on their physiological target. To achieve the desired (anticipat5ed) pharmacological response in the systemic circulation, aqueous solubility of a drug also affects the physical, chemical, dose stability, severs as a standard for purity, dissolution rate, rate and extent of absorption, and achieves the desired concentration of the drug in systemic circulation. When it comes to the formulation of medications, solubility is an extremely essential issue. A new API with high market demand must be developed by the formulation scientist if the molecule is to make it through the pharmaceutical development process. Solubilization techniques, such as chemical modification using solubilizers such as soluplus, povacoat, and dendrimers, as well as physical modification, complexation, and the use of surfactant, are being discussed in this review article because they are becoming increasingly important to the pharmaceutical industry by opening up new pathways for the preparation of effective and marketable drugs.

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The work investigated the design and evaluation of microspheres of Nitazoxanide by Ionotropic gelation technique met. 32 Factorial designs were used and concentration of polymer carbopol-934 (X1) and Ethyl cellulose (X2) were selected as the independent variables. The surface morphology study by SEM indicated that microspheres were spherical with smooth surface. There was no interaction between the drug and polymers, as studied by FTIR study. The prepared microspheres were characterized by entrapment efficiency, particle size micromeritic properties. It was observed that on increasing polymer concentration of formulations, % yield, the entrapment efficiency and particle size were increased whereas % drug release decreased. The In Vitro release study was done using U.S.P. dissolution rate basket type apparatus in phosphate buffer pH 7.4 for 10 hr. It shows that on increasing polymer concentration the drug release of all formulations was gradually decreased. In Vitro mucoadhesion study depicts that as the polymer concentration increased, mucoadhesive nature of the formulation was also increased. The microspheres of NTZ (formulation F9) showed best results due to highest drug entrapment efficiency (85.50%), and percentage drug release after 10.0 hr. was 50.25%. The rate of release followed First order kinetics. The microspheres exhibits good mucoadhesive properties in  in- vitro wash-off test at pH 7.4 (Intestinal pH) than pH 1.2 (gastric pH),because the drug was completely absorbed in Gastrointestinal tract, Therefore, it can be concluded that Nitazoxanide Loaded algino-carbopol-934 microspheres can be formulated for sustained drug delivery of Nitazoxanide used in Chronic Hipatitis-C. Keywords: Mucoadhesive microspheres, Nitazoxanide, Carbopol-934, Ethyl cellulose, Sodium Alginate, Factorial design.