An Investigation on Spray-Granulated, Macroporous, Bioactive Glass Microspheres for a Controlled Drug Delivery System

Bioactive glass (BG) has been regarded as an excellent candidate for biomedical applications due to its superior properties of bioactivity, biocompatibility, osteoconductivity and biodegradability. Thus, in this study, we aimed to fabricate drug carriers that were capable of loading therapeutic antibiotics while promoting bone regeneration using macroporous BG microspheres, prepared by a spray drying method. Characterizations of particle morphology and specific surface area were carried out via scanning electron microscopy and nitrogen adsorption/desorption isotherm. Evaluations of in vitro bioactivity were performed based on Kokubo’s simulated body fluid to confirm the formation of the hydroxyapatite (HA) layer after immersion. In addition, the in vitro drug release behaviors were examined, using tetracycline as the therapeutic antibiotic in pH 7.4 and 5.0 environments. Finally, the results showed that BG microspheres of up to 33 μm could be mass-produced, targeting various therapeutic situations and their resulting bioactivities and drug release behaviors, and related properties were discussed.

Formulation and Evaluation of Liposome by Thin Film Hydration Method

Liposomes are the most advance formulation for targeting and controlled drug delivery system. These liposomes are generally administered by intra-venous route. In this work the liposome was prepared by using thin film hydration method. The formulated liposome is evaluated or characterised by using zeta sizer, Encapsulation efficiency, Entrapment efficiency, In vitro drug release. Main things are drug which are used for formulation of liposome was Diclofenac sodium, it having anti-inflammatory and anti-pyretic effect. The Diclofenac sodium having several adverse effects, such as depression of renal function, Liver failure for repeated administration, Local mucosal irritation, gastritis. To avoid this adverse effect Diclofenac sodium are incorporate in liposomal formulation. By formulating liposomal formulation, the bioavailability of Diclofenac sodium increase. In conventional dosage form bioavailability of diclofenac sodium is 50℅. But in liposomal formulation bioavailability of this drug increase. The final result includes that diclofenac liposome formulation shows more sustained and prolong anti-inflammatory activity. Keywords: Diclofenac sodium, Liposome, Anti-inflammatory activity.

Quantum Chemical Investigation of Beta-CD-Catechin Flavonoid Encapsulation in Solution Through NMR Analysis: An Adequate Controlled Drug Delivery System

The high-water solubility of flavonoid catechin makes it a promising candidate as a drug in the treatment of various diseases. The formation of Beta-CD-Catechin inclusion complex has been proposed experimentally,...

Hydrogels as Controlled Drug Delivery System: A Brief Review of Properties Classification and Synthesis

Hyrogels are cariers of novel drug delievry system and these polymeric network have ability to hold large amount of water but they do not dissolve in water .These polymeric network may be crosslinked either through chemical or physical crosslinking method. Without changing their three dimensional structure hydrogels undergo the swelling mechanism Hydrogels are used as drug delivery carriers because of their distinctive properties. They have three dimensional configurations and have water soluble cross linked network of polymers .Hydrogels have porous structure and by changing the cross linker concentration we can modify their affinity for water. Because of their unique properties these are used for various medical purposes like cellular immobilization , tissue engineering ,diagnostics and regenerative medicines.

Chrono Modulated Therapy-A Review

Chrono therapeutic drug delivery systems stay attaining prominence in the area of pharmaceuticals. It decreases dosing incidence, toxicity, and distributes a drug that matches the circadian rhythm of that definite disease when the signs are exciting to sorrier.ChrDDS is the essentially time-controlled drug delivery system. It offers a patient with a staggered profile of the therapeutic agent. It makes some consecutive changes in the ADME process. This mechanism is lag time independent of environmental variables including pH, enzymes, gastrointestinal motility. The circadian rhythm regulates many body functions in humans, such as metabolism, behaviour, sleep patterns, and hormone production. Chronotherapy has gained attention as a novel and rational approach to exploit the best. Presently, drugs are delivered in a controlled release like an IR, ER, & PR. Certain conditions that follow circadian rhythms include hypertension, diabetes, cardiovascular, asthma, neurological disorders, ulcer conditions, etc. Various technologies such as time-controlled, pulsed, triggered and programmed drug delivery devices have been developed and extensively studied in recent years for chronopharmaceutical drug delivery are Diffucaps, OROS, Codas, 3D printing, Egalet, Port, etc. this system is designed according to body-clock. Special drug delivery technology must be relied upon to synchronize drug concentrations to rhythms in disease activity with the body’s 24-hour rhythms to extend therapeutic effectiveness and reduce/avoid side effects. In this article, the various concepts like a mechanism of circadian rhythms, current obstacles to the production of chronopharmaceutical drug, circadian chronotherapy in various diseases, a profile of launched Chronopharmaceutical dosage forms, various technologies for systemic delivery,chronopathalogy have been reviewed.