Leon 500 mg helped her previously. It shows that she was suffering from a respiratory tract
infection. Are you sure she is suffering from the same problem this time.
It needs to be found out why is she suffering from repeated respiratory tract infections.
It can also be an allergic attack and so is repeatedly occurring.
I would advise you better go to a Physician who can get a complete check up done and find out the exact cause.
Also Leon is an antibiotic so do not use it injudiciously. Use it only on prescription from a doctor.
Till then you could try taking steam inhalations and warm water to drink and gargle.