Methenamine
別名: Hiprex
Administer this medication with food to minimize stomach upset. Your veterinarian may recommend a specific diet or urinary acidifier supplement; it is critical to follow these instructions, as this medication **only works if the urine is acidic**. Ensure your pet has free access to fresh water. Do not give your pet any over-the-counter antacids without consulting your veterinarian.
劑量必須由獸醫按你寵物的個別情況決定。切勿在沒有獸醫指導下給予人類藥物或其他寵物的處方藥。
給藥方式
可能的副作用
- Gastrointestinal upset (nausea, vomiting, diarrhea)
- Dysuria or pollakiuria (due to formaldehyde irritation)
- Hematuria
- Crystalluria (at high doses)
注意事項與禁忌
- Renal insufficiency (can exacerbate systemic acidosis)
- Severe hepatic disease (due to ammonia production)
- Severe dehydration
- Metabolic acidosis
- Concurrent use of sulfonamides
- > **Urine pH must be monitored and maintained below 5.5** for the drug to be effective. > Not effective for upper urinary tract infections (pyelonephritis) or systemic infections. > Use with caution in patients with pre-existing gastrointestinal disease.
藥物相互作用
- Sulfonamides: Formaldehyde forms an insoluble precipitate with sulfonamides, increasing the risk of crystalluria and renal damage.
- Urinary alkalinizers (e.g., Potassium citrate, Sodium bicarbonate): Raises urine pH, preventing the conversion of methenamine to its active form (formaldehyde).
- Thiazide diuretics: May increase urine pH and promote diuresis, reducing formaldehyde concentration and contact time in the bladder.
常見問題
Methenamine用於寵物有甚麼用途？
Administer this medication with food to minimize stomach upset. Your veterinarian may recommend a specific diet or urinary acidifier supplement; it is critical to follow these instructions, as this medication **only works if the urine is acidic**. Ensure your pet has free access to fresh water. Do not give your pet any over-the-counter antacids without consulting your veterinarian.
Methenamine對我的寵物安全嗎？
劑量必須由獸醫按你寵物的個別情況決定。切勿在沒有獸醫指導下給予人類藥物或其他寵物的處方藥。
本文僅供一般健康教育，不能取代專業獸醫意見。如寵物身體不適，請諮詢獸醫。