Vits & meds for common colds

hello mommies,22 weeks preggo and may sipon ako, common colds lang.. and nag reseta OB ko ng immuno pro as vits + arithromycin at iba pang meds..Ask ko lang kung may nakapag try na dito ng vits na yun at mga meds pang sipon? iniinom nyo ba? medyo worried kasi ako although for sure safe naman yun. Thanks.