Philip, I have wrote this on some other topics, so I'll copy/paste some key things about BBs in our bodies:
Beta blockers slow down our Heart rate, like from 70-80 in resting to 60-ish, but also heart pumps weaker in each second when we are taking BBs. Instead of usual number (let's say 100%) it pumps only, let's say 80% of blood in each second (so, a heart pumps lower amount of blood in each second when we take BBs, compared to levels before Beta blockers. Let's say 0,80 litres now under Beta blockers, and 1,0 litres before BBs). Because of that, a heart as a muscle gets weaker (since it is working slower and pumps lower amount of blood). That is good in terms that we are "saving" our hearts and it's workload is lower, but in general, a heart is just weaker and weaker as a muscle.)
Now, when we drop BBs, our heart suddenly needs to pump 100% of blood again, in each second, like as it was programmed by default when we were born. And if we were taking BBs for 1-2-5-20 years, heart (as a muscle) got used to that 80% of pumping-level.
It is a huge shock for the heart, since it suddenly needs to beat much faster and pump much more blood in each second. You know that feeling when you didn't do any activity for years and then you start running/biking and similar for 1 hour per day, and then your legs and muscles hurt every day after that activity - Well, imo, now we are experiencing the same problem with hearts.
Plus, the problem is, when your legs hurt and when you are running too much, you can just stop for a few days and get some rest until they get better. But a heart can't get a rest, since it needs to beat all the time. You can't stop when you are tired...
So, more or less, a heart is under a huge stress currently and it is deconditioned. And it takes a few weeks/months until it gets somewhat conditioned and until it will be again, strong enough to pump 100% of blood in each second with 70-80 HR without any problems.
If your resting HR without BBs is slowly dropping from 100 to 90, 85 and 80, it means that your heart is slowly getting stronger and more conditioned. But, the longer you have taken BBs and the weaker your heart was due to BBs=the longer it will take to finish the withdrawal (or, to get your heart back in a normal shape).
This is why a longer tapering may lower the strength of withdrawal and stress to our hearts/whole body. That way, heart will be forced to go from 80% of blood pumped to 85%, then 85% to 90%, then 90% to 95% and 95% to 100% in the end. (When you drop for example, from 5 Mg to 4 Mg, then to 2 Mg and in the end to 1 Mg, then 0,50 and 0,25 Mgs for a few weeks.) But when you quit cold turkey or when you wean off for only 1-2-3 weeks, your heart will need to readjust from 80% to 100%, which is a huge stress, as you can see.
I am weaning off for the last 5-6 Months slowly, and it still hurts like hell and a heart still has lots of problems to adjust to these new 85%, 90% and 95% levels of pumped blood...
I was taking 1,25 of Biso for a year and a half. A few months ago, I tried to quit them and lowered the dose from 1,25Mg to 0,90, then 0,60 and 0,30 Mg in the end, and then I quit them completely (from 0,30 to 0,0 Mg).
I didn't "survive" it, I had too high pulse all the time for 2 Months and had to go back on BBs.
A few Months later, I tried to wean again, this time I lowered the dose like: 1,25 then 0,90, then 0,60, but this time: 0,50, then 0,40 for 1 Month, then 0,30 for a Month, then 0,20 for a Month, and now I am already 2 Months on 0,10 Mg (since I wasn't feeling well, even a drop from 0,20 to 0,10 took some time until my body readjusted).
Also, it seems that when we take BBs, we get less blood and oxygen into our organs and muscles and thus all muscles in our body atrophy to some extent.
So, when you quit BBs: 1. your heart will be under a lot of stress and it will take Months until it will readjust into a normal (slower) rhytm. 2. your all muscles will need months to get back into a shape and they may hurt you a lot (like lungs, abdomen and similar) once you start walking again, it will be extremely strange feeling. For example, when I lowered Bisoprolol, my lungs started to work better and I was able to take deep breaths again, and when I started to walk again after BBs, on first days, my lungs and the whole upper abdomen would hurt for 2-4 hours after walking as if I was lifting some heavy weight for 24 hours (lungs and muscles around lungs would hurt as if I worked way too hard and as if they will stop breathing out of tiredness in each moment. Very strange and scary feeling in the beginning. But it disappears once you get into a better shape and once your lungs start with deep breaths on a regular base again). 3rd, you will have problems with anxiety, there was a talk about it yesterday on another topic:
"Imagine that you have 100% of adrenaline in your body as a normal person.
When you are scared or extremely happy, it jumps to 120% and then your heart starts to beat faster, you breathe faster etc.
Now, when we take Beta blockers, Beta blockers don't allow to all adrenaline to affect your heart and brain. So, instead of 100% of adrenaline, only 80% of adrenaline affects your heart and brain.
That means that your heart beats slower and even when you are scared or happy, it doesn't beat as fast as in normal person.
So, for example, when you take Beta blockers, your heart will be affected by only 80% of total adrenaline, and when you are scared it will be affected by 100% of adrenaline.
While in a normal person, who doesn't take drugs, they will be affected by 100% of adrenaline all the time, and when they are scared (for short periods of time), they will be affected by 120% of adrenaline.
Now, our bodies are always re-adjusting to new circumstances. And so, when we take Beta blockers, our heart, brain and body start to think that 80% of adrenaline is "a normal state of our body".
And then, when you lower a dose of Beta blockers, let's say from 10Mg ro 5Mg, there will be less of a drug in your body, so the drug won't be able to block all the adrenaline anymore. For example, you won't be affected by only 80% adrenaline (on 10 Mg of Beta blockers), but with 90% of adrenaline (on 5 Mg of Beta blockers). If you quit them completely, you won't have any "protection" against adrenaline anymore, and your body will be affected by 100% of adrenaline again.
BUT, the problem is that a normal person, who never took Beta blockers is used to 100% of adrenaline, since it is a normal state of his body for him. While for us who were taking this drug for months or years, our body is now readjusted to only 80% of adrenaline.
So, when you lower the dose of a medicine or when you quit them, our body is in a huge shock. You are more or less under a huge stress all the time. More or less, when you quit beta blockers it is the same as when a normal person is scared to death or something. The problem is that a normal person is scared only for a few hours or days, while we, who quit beta blockers, are in that state of stress for 2-3-4-5 Months constantly until your body readjusts.
In that period after quitting Beta blockers, you will experience huge anxiety and being nervous and scared all the time for no apparent reason. You aren't crazy. This is happening because your body now has to cope with too high levels of adrenaline (and adrenaline is now free in our blood stream, because Beta blockers aren't blocking it anymore).
Because of all that, you will be nervous and have some anxiety.
And physical symptoms of anxiety will usually be: scared, short breath, dizziness, a lump in the throat, as if you are chocking from time to time, heartburn, burning sensation in abdomen from time to time etc
Plus, some classice symptoms of anxiety like:
Surge of overwhelming panic, Feeling of losing control or going crazy, Heart palpitations or chest pain, Feeling like you’re going to pass out, Trouble breathing or choking sensation, Hyperventilation, Hot flashes or chills, Trembling or shaking, Nausea or stomach cramps, Feeling detached or unreal.
And now, your body will again try to re-adjust to these new circumstances. But it will take some time (2-3-6 Months) until your body re-learns how to cope with adrenaline again. That means that the symptoms will usually be the strongest in the first 1-2 Months after quitting BBs and then later they will be weaker and weaker in majority of people.
One of the problems is that a lot of people feel very sick when they stop taking Beta blockers and due to horrible pains, anxiety, too high Blood pressure (due to a withdrawal) and some tachycardia or arrhytmia (due to a withdrawal) they think they need Beta blockers again and they are back in hell with Beta blockers.
So, the problem is: on beta blockers you will have 2-3-4-5 side effects due to drugs and then if you quit them, you will experience even worse side effects from a withdrawal (which can last for Months).
But then, if you can survive through a hell of a withdrawal, maybe you'll find luck with some other medicines with less side effects for you.
About anxiety from a withdrawal, my docs told me that I can take small doses of Valium daily for 1-2-3 Months until my body will re-adjust to 100% of adrenaline."
So, Philip, you will experience now:
1. too high heart rate and possibly dangerous arrhytmias for a few weeks/months
2. jump in a BP from time to time
3. problems with all muscles in your body
4. surely some anxiety due to free adrenaline in your system now, and then anxiety will again cause even higher heart rate and blood pressure
Imo, it would be better if you haev weaned slowlier.
If you still have some Bisoprolol at home, maybe you should cut the tablets into smaller pieces, like 0,30, 0,20 and 0,10 Mg. It seems as a low amount, but if you'll stay on that level for 1-2 Months, your body will readjust more easily to these lower levels, and then when you'll finally feel fine on 0,10 Mg, you can drop it completely (or take it every other day for some time and then drop them completely).
Good luck with a withdrawal, but for a lots of people, it can be extremely tough and dangerous.