Ultralente based insulin regimens--clinical applications, advantages and disadvantages.

. The prolonged action of daily injections of beef ultralente insulin provides a source for the basal, steady state insulin supply which diabetics need in addition to their meal requirements. The complete distinction between basal and meal insulin requirements, provided by two or three injections of soluble insulin per day, allows simple rules to guide both the physician and patient. Thus, the required ultralente dose needs to be continued daily, irrespective of illness or missing meals, whereas the soluble insulin requirements are given according to meals. When starting ultralente insulin therapy a loading dose is required. The doses of ultralente and soluble insulin needed for different severities of diabetes and degrees of insulin resistance can be predicted. A simple regimen to cover the decreasing insulin requirements of newly presenting, ketotic juvenile-onset diabetics has been developed. During surgical operations the continued basal insulin supply, from ultralente insulin, greatly facilitates diabetes control. Whilst many patients have improved nocturnal blood glucose control after transfer to ultralente insulin, optimal control of diabetes sometimes remains difficult in view of the pre-breakfast plasma glucose rise and the longer action of subcutaneous soluble insulin than the physiological meal insulin response. Purified monocomponent beef ultralente insulin is antigenic, and human ultralente insulin might be advantageous.