Are contraceptive injections safer than pills if a woman has a predisposition to blood clots?

The risk of thrombosis increases compared to when hormones are not used especially for estrogen-containing (i.e. two-component) contraception. Progestin-only injections, mini-pills, intrauterine devices or progestin-only implants are considered safer in this respect. I do not know what exactly you mean by "predisposition to blood clots". However, the risk assessment lies with the gynecologist. From a pharmaceutical point of view, I can provide information that in women "with active thrombophlebitis, or who have had or are experiencing thromboembolic disorders or cerebrovascular disease", the use of also non-estrogenic forms of hormonal contraception is contraindicated and the doctor should rather propose a method without hormones. I enclose additional information: https://www.gdziepolek.pl/kategorie/zastrzyki-antykoncepcyjne https://www.gdziepolek.pl/kategorie/antykoncepcja