Is there a sure medical treatment for premature ejaculation?

Many options. Distract by thinking nonsexual thoughts. "stop and start":  stop stimulation before ejaculation for 30 seconds and restart. Repeat as desired.  "squeeze" method: man or partner gently squeezes the end of penis (where the glans meets the shaft) for several seconds. Stop stimulation for 30 seconds, and restart . repeat as desired. Ssris such as prozac (fluoxetine). use condom/local anesthetic cream.
Premature ejaculati. No; there is no "sure cure." some patients respond to agents such as trazadone. Others may require desensitization/relaxation techniques. Xylocaine (lidocaine) lubricants can work too well and also affect the partner...