Altris gel contains melitane which helps to prevent premature greying.
Amexidil lotion contains Minoxidil
which helps to stimulate the hair follicles.
They can be applied safely under the guidance of your Doctor as it would not harm your hair.
It is better to wash hairs everyday, but kindly avoid using strong shampoos as it may cause further damage to the hairs.
Wishing you a Good Health.