Horseradish has an antibiotic action that is recommended for respiratory and urinary infections. It contains Vitamins C, B. sulphur and potassium. It also contains Vitamins A, P, B-complex, some calcium, phosphorus, iron and sodium.
Horseradish is used orally to decrease asthma symptoms, sinus congestion, catarrh, relieve cough from congestion and treat edematous conditions. It's also used as an adjunctive treatment for urinary tract infections, improve kidney function and kidney stones. It's used topically for respiratory congestion and minor muscle aches. Horseradish is used in foods as a flavoring agent.
Adverse reactions may include mucous membrane inflammation, GI irritation, abdominal pain, diarrhea, decreased thyroid function, skin irritation and blistering, and topical allergic reaction. Bloody vomiting and diarrhea may occur with larger doses. Using with anticoagulants or antiplatelet drugs may cause increased bleeding tendencies. When used with levothyroxine or hypothyroid therapy, it may further decrease thyroid function. When used with NSAIDs it may increase frequency of GI irritation. Patients with kidney inflammation should avoid using horseradish because of its diuretic effect. Patients with infectious or inflammatory GI conditions or stomach or intestinal ulcers and children younger than age 4 should avoid use. Pregnant patients should avoid taking large oral doses because of the toxic and irritating mustard oil components. Patients with thyroid conditions and those taking an anticoagulant or an NSAID should use horseradish with caution.
Oral use - Typical doses range from 6 to 20 g every day of the root or equivalent preparations. Topical use - Ointments contain a maximum of 2% mustard oil and are applied as needed.
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