Preparation of medical suspensions, pharmacilogical and clinical investigations
Main researcher
: IVANDIJA, LIBUŠKA (17203) Assistants
DOMINIS-KRAMARIĆ, MIROSLAVA (153783)
KNEŽEVIĆ, ZDRAVKA (184631)
KRIŽANEC, VLASTA (184605)
KOPRIVANAC, STANISLAV (184616)
PRIMER, SNJEŽANA (191366)
Type of research: developmental Duration from: 01/01/90. to 12/15/95. Papers on project (total): 3
Papers on project quoted in Current Contents: 1
Institution name: Pliva - Istraživački institut, Zagreb (60) Department/Institute: Veterinary products & agrochemicals Address: Prilaz baruna Filipovića 89 City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (41)181028
Fax: 385 (41)576690
Summary: By a new technology, product antiparasitic MonilR 10%
suspension for veterinary purposes was prepared. The granulometric
characteristics of the obtained suspension prove considerably better
efficiency compared to the product obtained by previous procedure (90% of
particles up to 3,5 mimrometer : 90% particles up to 25 micrometer).
Biological trials on cattle has proved good tolerance and no adverse
effects of the drug, as well as a higher level of bioavailability. Because
of expiring of the Pfizer's patent (in 1994) for oxytetracyclin retard
injections (LiquamycinR LA 200) there will be possibility to patent and
sell the parallel product produced by PLIVA (GeomycinR retard 20%
injections for veterinary purposes). By selecting the adequate
technological procedure, we obtained the product with physical, chemical
and pharmacodynamic properties identical to LiquamycinR LA 200 (Pfizer).
The comparative experiments have showed that the both products have the
same local tolerance and very good bioavailability (963 blood samples were
examined). Ineffort to replace the import of the foreign product SIMIVET
15% LA suspension, for veterinary use, with ourown formulation and
technology, two formulations were prepared applying Dyno-mill technology
and were sent on stability testing. In attempt to achieve the greater
efficiency, especially antibacterial action of the preparation intended
for treatment of the mammary gland infection in cattle (Ampivet K
suspension, for veterinary use) the clinical form and concentration of the
active substances were changed. As a consequence of introducing the new
cemical form of the active substrances is their better dissolving, what
together with the increased concentration of the drugs incorporated in a
appropriate media produce accomplishment and maintenance of an adequate
concentration of the active substances on the site of infection. By using
Dyno-mill technology two formulations with different vehicles (vegetative
and mineral oil) were prepared and sent on stability testing.
Keywords: suspensions, new technology, pharmacotoxicological properties, clinical efficiency
Research goals: The goal of the project is the preparation of oral,
parenteral and intramamary suspension by wet micronization in order to
achieve very fine dispersion of uniform particles in liquid phase (particle
size up to 10 nicrometer) as well as the comparison of their
characteristics to the preparations obtained by standard technology. To
achieve more efficient treatment of animals, we have been developing the
formulations with prolonged activity. Preparations are based on the gradual
release of drug by which the continious and effective blood level of active
substances during the day is achieved. The prolonged effect of the
formulation is the consequence of controlled release of active substance
under the influence of additional substances without tissue damages. The
expected goal is on one hand to achieve the preparation of mentioned
suspensions of high physical and chemical stability, and on the other hand,
the preparation of medical preparations which meet the strict requirement
concerning pharmacological properties and clinical activity. The
preparations of high quality and obtained in this way are ready to enter
the world market.
COOPERATION - INSTITUTIONS
Name of institution
: Zavod za ispitivanje i kontrolu lijekova Type of institution: International organization City: 10000 - Zagreb, Croatia