This was a list of the drugs that Jesus Manzano admitted taking during his career. In some of his interviews he has mentioned what the exact benefits of the different PED's.
From CyclingNews March 2004:
Actovegin (extract of calves blood which supposedly improves oxygen carrying capacity)
Albumina H. (protein in blood plasma)
Androgel (testosterone)
Aranesp (Darbepoetin alfa = super EPO)
Celestote (corticosteroid)
Eprex (EPO)
Genotorm (growth hormone)
Hemoce (plasma)
Deca durabolin (anabolic steroid)
Humatrope (growth hormone)
IgF1 (insulin growth factor 1)
Neofertinon (hormone to stimulate ovulation and estrogen production)
Neorecormon (hormone that regulates red blood cell production)
Norditropin (growth hormone)
Nuvacten (corticosteroid)
Trigon (asthma drug)
Urbason (corticosteroid)
Ventolin (bronchial dilator)
Oxandrolona (anabolic agent)
Vitamin B12 (essential B vitamin)
Triamcinolona (corticosteroid)
Testoviron (testosterone)
Aspirina (analgesic, anti-inflammatory)
Oxyglobin (artificial haemoglobin intended for anaemic dogs)
Hemopure (artificial haemoglobin)
Ferlixit (iron)
Caffeine (stimulant)
Hemassist (artificial haemoglobin)
Prozac (antidepressant)