Does Susten Cause Miscarriage?

i have been prescribed susten 100 twice daily (morning and night) i'm in my 6th week of pregnancy.. before getting pregnant i've been getting my periods on time and not had a abortion or miscarriage.. i'm first time pregnant and very excited abut my baby.. browsing in the internet sayz susten may cause abortion.. i'm very worried now.. y has the doc prescribed me to have susten 100.. plz help.. thank u..