<s>[INST] For the last three weeks I have had difficulty ejaculating. What is the problem..?? I am 65 years old and in good health...for the most part. Taking a 5mm dosage of blood pressure medication (Mavik) daily and a multivitamin daily . High BP is mild for the most part . Have noticed a progressive decline in my ability to maintain a hard erection over the last year but have always been able to penetrate and ejaculate until now... [/INST] Hello dear,Thank you for your contact to health care magic.I read and understand your concern. I am Dr Arun Tank answering your concern.Men can have good sexual power through out the life. But over the year after sixty years the power of sex that is erection and ejaculation decreases and pose problems. I think you are posing the same problems.Some blood pressure medication can affect ejaculation. I think you might be affected by both age and the drugs in minor extent.But in your age you should not worry about erection and ejaculation now. Its not the disease process but its aging process and so you should not worry.I will be happy to answer your further concern on bit.ly/DrArun.Thank you,Dr Arun TankInfectious diseases specialist,HCM. </s>