mesna

mesna /mes·na/ (mez´nah) a sulfhydryl compound given with urotoxic antineoplastic agents because it inactivates some of their urotoxic metabolites.

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mesna

Mesnex, Uromitexan (CA) (UK)

Pharmacologic class: Detoxifying agent

Therapeutic class: Hemorrhagic cystitis inhibitor

Pregnancy risk category B

Action

Reacts in kidney with urotoxic ifosfamide metabolites (acrolein and 4-hydroxy-ifosfamide), resulting in their detoxification. Also binds to double bonds of acrolein and to other urotoxic metabolites.

Availability

Injection: 100 mg/ml in 2-ml and 10-ml vials

Tablets (coated): 400 mg

⊘Indications and dosages

➣ To prevent hemorrhagic cystitis in patients receiving ifosfamide

Adults: Combination I.V. and P.O. regimen - Single I.V. bolus dose of mesna at 20% of ifosfamide dosage, given at same time as ifosfamide, followed by two doses of mesna tablets P.O. at 40% of ifosfamide dosage given 2 and 6 hours after ifosfamide dose. I.V. regimen - I.V. bolus of mesna at 20% of ifosfamide dosage given at same time as ifosfamide, repeated 4 and 8 hours after each ifosfamide dose.

Dosage adjustment

• Children

Contraindications

• Hypersensitivity to drug or other thiol compounds

Precautions

Use cautiously in:
• autoimmune disorders
• pregnant or breastfeeding patients.

Administration

• Dilute with dextrose 5% in water, dextrose 5% in normal saline solution, or lactated Ringer's solution for injection.
• Give I.V. bolus over at least 1 minute with ifosfamide dose and at prescribed intervals after ifosfamide doses.
☞ Don't use multidose vial (contains benzyl alcohol) in neonates or infants. In older children, use with caution.
• If patient vomits within 2 hours of oral mesna dose, repeat oral dose or switch to I.V. route.

Route	Onset	Peak	Duration
P.O.	Unknown	4-8 hr	24 hr
I.V.	Unknown	1 hr	24 hr

Adverse reactions

CNS: fatigue, malaise, irritability, headache, dizziness, drowsiness, hyperesthesia, rigors

CV: hypertension, hypotension, ST-segment elevation, tachycardia

EENT: conjunctivitis, pharyngitis, rhinitis

GI: nausea, vomiting, diarrhea, constipation, anorexia, flatulence

Hematologic: hematuria

Musculoskeletal: back pain, joint pain, myalgia

Respiratory: coughing, tachypnea, bronchospasm

Skin: flushing, rash

Other: arm or leg pain, injection site reactions, fever, flulike symptoms, allergic reactions

Interactions

Drug-diagnostic tests. Hepatic enzymes: increased levels

Urinary erythrocytes: false-positive or false-negative results

Urine tests using Ames Multistix: false-positive for ketonuria

Patient monitoring

• Monitor nutritional and hydration status.
• Monitor vital signs and ECG. Watch closely for blood pressure changes and tachycardia.
• Assess body temperature. Stay alert for fever, flulike symptoms, and EENT infections.
• Monitor respiratory status carefully. Watch closely for cough, bronchospasm, and tachypnea.

Patient teaching

• Inform patient that drug may cause significant adverse effects. Reassure him that he'll be monitored closely.
• Encourage patient to request analgesics or other pain-relief measures for headache, back or joint pain, hyperesthesia, or muscle ache.
☞ Advise patient to immediately report breathing difficulties and allergic symptoms.
• Inform patient about drug's adverse CNS effects. Explain safety measures used to prevent injury.
• As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the tests mentioned above.

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mesna

Oncology A uroprotective agent that protects the urogenital tract from toxicity of ifosfamide and cyclophosphamide Adverse effects Rash, itching, diarrhea, N&V. See Cyclophosphamide, Ifosfamide.

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Patient discussion about mesna.

Q. my dad has msa, he has recently started seeing things, eg aliens, government consp.ext not fully reconzing lov does not reconize loved ones while having these episodes, becomes anxious and ill manered just not like my dad at all, he's so quite and polite normally.

A. yeah the book would be good to read but m s a stands for multi systems actrophy. once i'd asked my ? i realized it didnt seem to be on here. its a very fast shitty illness that is often misdiagnosed as parkonsons, sorry know spelling bad i'm tired but canna sleep as worried, he was diagnosed 2yrs ago but we think he may have had it longer hes 64yrs old. thanks for answereing me