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Methionine is commonly used to acidify the urine and is not recommended for kittens or animals with renal failure, pancreatic disease, or liver insufficiency. Acidifying the urine may help prevent and treat certain types of stone formations and to reduce odor from the urine.
Possible adverse effects include gastrointestinal upset. If given with food, methionine may have reduced side effects and increased efficacy. Methionine can be given with food or mixed in food unless otherwise instructed by your pet's veterinarian.
If too much methionine is given or if overdosage occurs, it can lead to anorexia, uncoordinated muscle movement, and cyanosis (a blue or purple pigmentation of the skin due to low oxygen levels).
It is important to give your pet this medication exactly as prescribed and to not discontinue the drug without consulting with pet's your veterinarian. If you miss giving your pet the dose, give it to him as soon as you remember. If it is close to the next dose, skip the missed dose and continue on your normal schedule. If you are unsure about when to give a missed dose, contact your pet's veterinarian.