Hello sana;
welcome to HealthcareMagic
The tablet prescribed by the doctor is a antihistaminic called
cetrizine hydrochloride.It is a antiallergic so it is prescribed even for itching and
redness due to
allergic reaction due to use of any cream/medicine/insectbite or just a hypersensitive skin reaction.
In your case why it has been given your doctor will be the correct person to answer this.
Thanks