A primary issue with many cats, especially neutered males, is a problem with calculi in the urinary tract due to abnormal pH levels.
It is also present in urine and in urinary calculi.
They also hinder the formation of uric acid calculi.
Magnesium ammonium phosphate, MgNH 4 PO 4.6H 2 O, is found as the mineral struvite and in some guanos; it occurs also in urinary calculi and is formed in the putrefaction of urine.
In pain due to violent sciatica relief and even permanent cure has been obtained by the injection of morphine directly into the muscle of the affected part, and in the treatment of renal and hepatic colic morphine given subcutaneously will relieve the acute pain consequent on the passage of biliary and urinary calculi.