Thanks for your query
1) The use of enalapril
has been shown to be of benefit in a few patients with loin pain hematuria
syndrome. So you can definitely try this medication under the supervision of a doctor.
2) I would recommend a metabolic work up viz., 24 hour urine collections for Calcium, uric acid, citrate, oxalate
and pH. BAsed on the results we can make appropriate dietary recommendations.
Hope this helps