AZT at a small dose can cause problems too, especially if your in the 1% that gets the 0.0 something percent of the mega super bad side effect that NEVER happens in patients... A friend took AZT, next thing he knows, hes having micro seizures or heart attacks (probably due to his blood being depleted of almost all RBCs, had a hematocrit of 12 (which is the blood of a corpse) and had his bone marrow shut off.