1) Botulinum toxin A (Btx-A) injection into the bulbospongiosus muscle (BSM) was found to significantly lengthen the latency time to ejaculation in rats compared to placebo, suggesting Btx-A may be an effective treatment for premature ejaculation (PE) in humans. 2) A clinical trial was proposed to study Btx-A injection for lifelong PE but was declined by Allergan due to concerns about supporting an unlicensed use of their product. 3) Further research is still needed but Btx-A injection shows promise as a treatment for PE that may avoid the side effects of current options like topical anesthetics or antidepressants.