welcome to healthcare magic forum
is us -fda approve for hair loss ,in some patient we can not find good result .
it is vasodilator drug and not advisable to take in patient with heart problem
side effect and effect of it are reversible ,once you stop medicine ,in 4-6 months all effects are gone usually .
so i do not think your problems are due to minoxidil only
better to consult doctor
and get yourself examined
i hope i answered your question