Yes you can draw them into One syringe.
I've ran some heavy cycles of peptides. 6 months on 6 months off 6 months on 6 months off 6 months on and then i stopped. I was pinning 7 times a day 7 days a week.
I've ran CJC 1295 No Dac, sermorelin (extensively), Ipamorelin, GHRP2, GHRP6, BPC-157, IGF-1 and triptorelin
BT.