Volume 43 of Progress in Drug Research contains five reviews and the various indexes which facilitate its use and establish the connection with the previous volumes. The articles in this volume deal with high cholesterol blood levels and other dyslipidemias; search of ideal antihypertensive drugs; the natural PQlyamines and the immune system; biologically active quinazolones and with production and action of interferons. In the 35 years the PDR has existed, the Editor has enjoyed the valuable help and advice of many colleagues. Readers, the authors of the reviews, and last but not least, the...