Jon wrote:
Supplements: including Niacin 100mg 3 X daily plus another 100mg
included in some Cardio concoctions I take. In the last couple of
days I've had increased arrythmia and dizzyness. I also am supposed to
wear a .4mg/hr nitro patch.

Am I getting a nitro/niacin overdose? It lets up when I skip the
niacin. I guess I need a prescription adjustment.
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Hi Jon,

This from MedlinePlus: Niacin

Nitrates (e.g., nitroglycerin and isosorbide)—Niacin may increase the
effects of these medications or may have increased side effects when
these drugs are given together.

http://www.nlm.nih.gov/medlineplus/druginfo/uspdi/202404.html

Is the 'Cardio concoctions' prescription or OTC?

I'm very leary of taking anything that contains numerous ingredients.
If you experience adverse effects, it's difficult to determine the cause.

Make a list of all your supplements and prescriptions, including the
dosage. Search (Google or Yahoo) one of the scripts against the others
and with the OTC's. I had to do this with my mother-in-law last
summer. She took one OTC that contained 30 different ingredients.
Three were in direct conflict with her BP meds. She was a mess. I (and
her Dr) thought she had lupus. Actually, she did, but it was 'drug'
induced. Once we got rid of the offenders, the rash (all over her
body) cleared.

Fran