Thank you very much for the reply.
I am trying to move out of nifedipine altogether but will do it gradually for fear that my blood pressure may get out of control. The reason is because i suspect it to have a bearing with my tinnitus that took place about 2 months ago at the same time when I moved up my daily intake of nifedipine from 10 to 20 mg, and went worse when I moved into adalat gits which comes with the min 30 mg tablets.
Questions:
(1)Do you have anything to suggest to help alter my above-mentioned combination gradually? How about replacing one tablet of nifedipine with one tablet of plendil 2.5 mg or others?
I know what my doctor will say. He will urge me to stay on and dismiss beta-blocker content in Lodoz(5 mg of bisopro

fumarate
+6.25 mg of hydrochlorothiazide) as being a possible cause for my poor erection and will ask me to put up with my tinnitus. So I would forget about him first.
(2)I am using a kind of generic fidedipine drugs which are made like adalat retard. It needs to be taken twice a day. But when i moved to adalat gits (30 mg) about half a month ago, i found the new drug (adalat gits) to be totally ineffective without its drug interaction with beta-blocker. The day before I discontinued adalat gits, I took one tablet with a diazide(25 mg hydrochloridethiazide) at 8am in the morning. But 10am, my bp went to 170/100 and this was not the first time! So that was the clear signal i should discontinue adalat gits.
Now I am back to the old combination as mentioned above. Whenever my bp is out of control, i have found a Lodoz to be my life saver! IS
THERE ANY DIFFERENCE BETWEEN ADALAT RETARD AND ADALAT GITS?
(3)I used to be on Norvase for many years until sometime this year I discovered the tablet was getting weaker and weaker. I moved out of it upon a doctor's advice and moved into nifedipine. I tried to get back also upon two doctors' advice but have been unsuccessful. It took me A LOT OF suffering to have finally realized that most calcium channel blockers are not effective to me at all AT THIS TIME without a drug interaction with beta-blockers. And i do find beta-blockers to hiner my erection. But now i place controlling my bp as the first priority and ask my girl friend to 'work harder' when she is with me.
So Dr. Chung, what do you think is the reason that my body no longer responds to calcium channel blockers adminstered either alone or with diurectics(with the exception of indapamide, which caused me headache and constipation)? Is there anything wrong or changed with my body metabolism?
Thank you in advance for your answers, in particular to how you would advise me to alter my current medication intake. By the way, I just had to try by trials and errors to have come up with my current combination, sometimes with doctorS' advises during crisis about 2-3 months ago. Most of the doctorS' advices did not work at all. Most new med combinations prescribed worked for the initial few days and all of a sudden my bp got out of hand. Without that Lodoz, I would have been in serious trouble by now.
I so miss the old days in which I took just one pill a day for my hbp.
Now i have to take med twice and sometimes 3 times daily. Taking bp med is now an issue in my daily life and is getting very unpleasant.