First at all a very warm welcome on this forum
I have a little tip for you, if you have arrythmia`s then there is a special test you can do to see if you have a shortage of potassium, this is often a cause of the problem.
You can see if this is the case with you by eating 4 or 5 ripe bananas a day. If you have cardiac arrhythmia and it gets less by eating the bananas then we can always proceed to taking potassium tablets.
About your dizziness it is possible that your betablocker is causing this, your bloodpressure is to low.
Maybe the amount of Coreg is to high.
Coreg can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Avoid drinking alcohol within 2 hours before or after taking extended-release carvedilol (Coreg CR). Also avoid taking medicines or other products that might contain alcohol. Alcohol may cause the carvedilol in Coreg CR to be released too quickly into the body. Check the labels of any prescription or over-the-counter medicines you take to see if they contain alcohol (also called ethanol).
Coreg side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have any of these serious side effects:
slow or uneven heartbeats;
feeling light-headed, fainting;
feeling short of breath, even with mild exertion;
swelling of your ankles or feet;
nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
cold feeling in your hands and feet.
Other less serious side effects are more likely to occur, such as:
decreased sex drive, impotence, or difficulty having an orgasm;
sleep problems (insomnia);
tired feeling; or
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
There are a number of medications that are used in treating
hypertension. Beta-blockers and ACE inhibitors are just two types of
these medications. Here is some general information about them.
“[Beta blockers] work by blocking the effects of certain chemicals in
your body. With some of these drugs, your heart may beat more slowly
and less forcefully. With others, your blood vessels may dilate and
you may feel faint when you stand up. These actions on your heart and
blood vessels lower your blood pressure. . . .
Beta-blockers have been proven to reduce the risks associated with
hypertension, including heart attacks and strokes. They have been used
for many years, their side effects are well known, and they are
generally less expensive than some other blood pressure medications.
All antihypertensive classes reduce CVS [cardiovascular system] events
with perhaps the exception of alpha blockers. . . .
Angiotensin converting enzyme (ACE) inhibitors (lisnopril)dilate your blood
vessels by blocking the formation of the natural body chemical
angiotensin II, which constricts blood vessels. However, up to 20% of
people who take ACE inhibitors . . . develop a dry, hacking cough.
This annoying side effect typically occurs in the 10 to 24 weeks after
starting the drug. The cause is unknown. Switching to another type of
ACE inhibitor may decrease or stop your cough. There are also similar
anti-hypertensive medications that may not produce a cough. Don't stop
taking a medication without first seeing your doctor. These drugs may
be particularly effective in patients with diabetes and renal