Complex sentence: Its peripheral vascular effect has indicated its use for vertigo, dyslexia and, at one time, sickle cell anemia as well, but a subsequent Cochrane review of the evidence found that it did not support piracetam's use in sickle cell crisis prevention.
Split into simpler sentences: Its peripheral vascular effect has indicated its use for vertigo, dyslexia and sickle cell anemia. A subsequent Cochrane review of the evidence did not support piracetam's use in sickle cell crisis prevention.