yes
They can cause Cancer.
Yes.
I read that nausea is one of the side effects.
Skin rashes are one external symptom of typhus (Rickettsia) infection.
A cat's urine does not cause rashes. Cat's like to urinate in a litter box or a sand box if outside.
No
No
no
Metoprolol should not cause red hot cheeks, that sounds more like a hot flash. Metoprolol is used for blood pressure, this may in fact cause a hot flash, if you are controlling your blood pressure.
It is very unlikely, but yes, because any cosmetic products may cause you to have a reaction and produce rashes on your skin.
According to medicines.org.uk, "water retention causing swelling" is a rare side effect of metoprolol affecting about 1 in 1,000 users of the drug.