Two types of wasted plastics and AI-contg. multi-material pharmaceutical packages (pre- and post-consumer) were analyzed by thermogravimetric method carried out under Ar at up to 700 degrees C. The total mass losses were 68.27% and 58.43% for pre- and post-consumer waste, resp. A single thermal decompn. reaction was obsd. at 330 degrees C for preconsumer waste and two reactions were obsd. at 312 degrees C and 328 degrees C for post-consumer waste. Sepn. of the materials for thermal processing was not necessary.