Hello Medication taken by you is anti histamine and it will be only helping you in the attack phase of cold So as to avoid recurrent cold a proper case history should be taken so as to find the exact causative factor (Hetu) for persistent cold Along with that therapies like vaman and nasya are also highly effective . Post these treatments rasayna treatments will resolve your complaints and also elevate your overall wellbeing . See a good Ayurveda PRACTIONER near you .