It just suggests that his BP is high and that the medication is bringing it to normal. The 120/76 is bang on, and I wouldn't be concerned that the medication is doing such a good job.
The half life of most blood pressure medications is around 11-12 hours which means by the following morning, the effects will have pretty much worn off, meaning a fresh top up.
The fact that his blood pressure drops after the meds is a good thing. It lets you know the meds are working. Here is a short breakdown of the meds he is taking that I am familiar with:
Isosrbide is a long acting type of nitrate for chest pain
Plavix is a blood thinner
Coreg is a beta blocker to lower blood pressure and help with the heart rate and rhythm
Zantac is to help with heartburn
Norvasc is a calcium channel blocker to help lower blood pressure and help with angina (I take this for heart spasms)
Lotensin is also used to treat high blood pressure
I hope this helps you some. How is your husband's cholesterol? I don't see where he is taking a statin or fenofibrate (sp).
If you feel his blood pressure is dropping too low you can talk to his doctor about adjusting the doses, but he should NEVER stop taking his meds without consuting with his doctor first.
Take care, Ally
It is a fact that the human BP follows a circadian rhythm that increase in the early ours of the day. So depending at what time he takes the BP, this can be a reason.
However, I would say that if he has suffered already a heart attack (you do not indicates what the reason for the stent "below" the heart was) the 120 that you list as normal it seems high to me.
If what he is suffering it is a Cardiovascular disease, I miss some statin in his medication.
Measuring the BP always in the same conditions it is important because can give you the trend as well as the reaction to the medication. Anyway those values I think are worth while to comment with your cardiologist.
Think