A STUDY ON THE QUALITY DECREASE OF AMOXICILLIN, ASPIRIN PH8 AND VITAMIN C DRUGS BY TIME UNDER THE EFFECTS OF TEMPERATURE AND HUMIDITY AT DIFFERENT AREAS IN HUE PROVINCE

Abstract

Background: A preliminary research about the relation of drug quality decrease through period of stored time by temperature and humidity at different geographic areas was carried on Aspirin pH8 intestine-disolved coated tablets, Vitamin C film coated tablets and Amoxcycillin capsules. Materials and method: Pharmaceuticals possessing same manufacture batch and date expire longer than experimental period preserved at Thuan An coastal area, Nam Dong mountainous region, flat country of Hue Province and Hue Drug Quality Control Centre, Vietnam. The change of temperature and humidity at drug stored pharmacies was recorded contineuosly. Monthly, these drugs were examed quality following Standards of Vietnam Pharmacopie Volumn III, edition 2002 and in-home Standards. Results: The decrease of drug quality happened earliest and strongest at Than An, then Nam Dong, sustained a severe elimate condition yearly. Especially, effect of humidity element on the drug decomposition was serious than temperature. The decrease of drug quality was also happened at Hue city but in gentle degree, while all drugs were still in good quality under the standard store condition at Drug Quality Control Centre (25oC, 60%). Conclusion: This research showed an importance of the temperature and humidity control during the store and delivery periods to maintain the drug quality sufficiently for treatment. Key words: drug quality, stored time, geographic areas, temperature, humidity