In cases of tenesmus, whether of the bladder or rectum, bromides will often be found useful. Hammond recommends bromide of camphor (British Medical Journal, i., 1877), and 1/2-dr. doses of bromide of potassium have given relief to a severe case of rectal spasm when opium, belladonna, and instrumental interference all had failed (Lancet, ii., 1873, p. 45G).