Can I use diet pills and Belara?

Can I use belara contraceptive pills to take slimming pills with the composition listed below? Won't the use of diet pills reduce the effect of contraception? Composition of slimming tablets: Chromium, Paraguayan holly leaf extract (Yerba mate), Bitter orange extract, including: 6% synephrine, Green coffee extract, including: 50% chlorogenic acid, Selenium, Cayenne pepper extract, including: 8% capsaicin, Black pepper fruit extract, including: 95% piperine, Grape seed extract, Guarana extract, including: 22% caffeine, Garcinia cambogia fruit extract 60% HCA, including: 60% HCA acid (hydroxycitric acid), Seaweed extract, including: 0.1% iodine, Riboflavin (vitamin B2), Vitamin B12, Gymnema sylvestre leaf extract, including: 25% gymnemic acid, L-carnitine tartrate