Hi. My Father Have Grade Left Sided Hydroureteronephrosis Due To

hi. my father have Grade left sided hydroureteronephrosis due to small left lower ureteric calculus. My father is 64. as per IVP problem is tiny radio opaue shadow of size apporx. 3.6 mm is seen in the left side of the pelvis. Dr. said that it is stone and according to dr. my father are taking following medications
Stonil 2 spoon in twice a day
Anzistone thrice a day
Palin DSR one in morning empty stomach
Riflo one in night
Norfloxacin tab IP 400mg twice a day
Paracetamol & Dicyclomine hydrochloride tab twice a day
Diclofenac sodum tab ip 50 mg twice a dyan.

My father pain is often occur not very high as such first time occur when we admit to hospital.
I want to know these medicine will destroy the stone. how much time it will take to go normal.
Any other suggestion that can treat it well very soon. about nutrition what they should avoid and what to take most.
Please help.