AniMed 20 oz. AniHist Antihistamine Granules Catalog Horse AniMed 20 oz. AniHist Antihistamine Granules Manufacturer : AniMed Animal Nutrition & Healthcare Products Description An oral antihistamine and expectorant for use in horses. For the relief of heavy horses and barn cough. Great for season allergies. Rates Please contact us for current pricing and availability.