[Code of Federal Regulations] [Title 21, Volume 6] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR529.1526] [Page 329] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 529--CERTAIN OTHER DOSAGE FORM NEW ANIMAL DRUGS--Table of Contents Sec. 529.1526 Nifurpirinol capsules. (a) Specifications. Each capsule contains 3.8 or 7.6 milligrams of nifurpirinol. (b) Sponsor. See No. 000074 in Sec. 510.600(c) of this chapter. (c) Conditions of use. (1) The drug is used in treating aquarium fish for the control of columnaris disease caused by Chondrococcus columnaris susceptible to nifurpirinol. (2) Use one 3.8 milligram nifurpirinol capsule for each 10 gallons of aquarium water. Empty the contents of the capsule directly into the water and stir briefly. Treat for at least 1 hour. If activated charcoal or carbon filtration is being used, disconnect during treatment, but maintain adequate aeration. Resume water filtration after 1 hour treatment. Usually a single treatment is sufficient. For aquariums with charcoal filters, nifurpirinol can be used once each 24 hours up to 3 consecutive days, discontinuing filtration during treatment. If aquarium does not have charcoal filter, do not retreat within 5 days. (3) Do not use in salt water aquariums. (4) Do not use while egg bearers or live bearers are reproducing. [40 FR 60052, Dec. 31, 1975, as amended at 47 FR 20758, May 14, 1982; 56 FR 43699, Sept. 4, 1991]