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tablets are a combination of Amoxycillin
and claulanic acid.It is indicated for respiratory tract
infection and the dosage of the medicine is calculated according to the weight of the adult or child.In children the dose is 20-40 mg per kg of weight as per the severity of the infection.If your child is 45 kg then the dose comes to 900mg which can be divided into 2 or 3 doses.The better way is to give is Amoclan 325mg twice a day and that should be enough if the infection is not very severe.
Take care and wish your child a speedy recovery.