Hi Sir, Welcome to Health Care Magic I can certainly understand your concern and worry about your sexual problem you have mentioned that you are diagnosed with diabetes and taking diabetic pills, as these pills does not affect your erection, so avoid thinking and worrying.I can advise you to avoid alcohol and smoking if any, maintain adequate weight, be relaxed and stress free, perform some pelvic exercises I can advise a simple technique called master and johnson technique, in which just before ejaculation ask your wife to squeeze the foreskin of the penis forward to withstand your erection , this you can try for the second time for effectiveness. At last you can start sildenafil , which helps in the production of nitric oxide NO , for sustaining your erection for long time. I would like to know whether you are taking any treatment for HBS as you are positive? Post your further questions if any, I will available to take up your follow up questions Thank you