Thanks for your question on Health Care Magic.
I can understand your concern.
Marijuana smoking (chronic) can cause heart diseases like
arrhythmia (rhythm disturbances in heart),
heart failure, coronary artery disease etc.
And all these can cause
hypotension and palpitations.
If not treated promptly, this can be life threatening.
So first quit Marijuana smoking as soon as possible.
Consult cardiologist and get done blood pressure monitoring, ecg, 2d echo, Holter monitoring (24 hour continuous monitoring of ecg) and
stress test to rule out all these heart related diseases.
So low blood pressure in Marijuana smoker can cause serious life threatening complications if not treated promptly.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.