I live in singapore and have cholesterol and slow blood flow in artery, on aspirin, clopidogrel but they gave side effects, what alternatives can I use?

Complicated issue. There are other options, like statins, drastic changes in diet and life style, stenting of the artery and perhaps more. However, you need an in-person evaluation, lab tests and imaging studies; or review of those if you already have those, for proper diagnosis and treatment. You will need long term follow-up. Pick a cardiologist you trust and follow his/her advice.