Is there a pill to treat retarded ejaculation?

Not Exactly. There are some medications (particularly antidepressants) that can cause delayed ejaculation and switching medications can sometimes help. The primary treatment is to first determine the cause and then treat the cause. Unless there is a medical issue causing the delay, treatment usually consists of counseling or psychotherapy.
No. Retarded eyaculation may be a side effect of medicines like antidepressants or others, and maybe a misinterpretation of retrograde eyaculation when sperm goes back to the bladder instead of forward to the exterior. Retarded eyaculation may be beneficial in males with premature eyaculation.