Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Effective of Methioform for managing UTI in cats

My cat since when she was very young has had a recurring tendency to develop Urinary Tract Infection. On our Vet's recommendation, I put her on half a tab of methioform daily to change the PH of her urine. This has been very effective in keeping the UTI at bay. Methioform also has the advantage of being very palatable for cats; my cat, who is very bad with medication usually just happily munches it up with her dry biscuits. I would recommend this as a good way of preventing a nasty and troublesome problem. I am writing from outside of the US; I had trouble purchasing methioform from a few websites, particularly Animal Meds sites because they require prescriptions. I was able to buy it at Amazon with no hassles.