Can I give Hitaxa 5 mg to a 9-year-old child weighing 32 kg? Is it possible to give a Hitaxa tablet the day after I finish taking Clatra?

Hello! Child 9 years, weight 32 kg. Yesterday morning he took Clatra 10 mg, the doctor changed the drug to Hitaxa 5 mg, according to her, the weight of a child over 30 kg predisposes to a dose of 5 mg - is this really the case? And can I give Hitaxa today since I served Clatra yesterday morning? Won't there be any adverse reactions? Thank you for your reply.