Serum insulin levels in diabetics after subcutaneous administration of Rapitard insulin

Circulating levels of immunoreactive inculin were measured in six diabetics after the subcutaneous injection of Rapitard insulin. Serum insulin levels rose within 15 minutes, with a peak level generally at one to three hours. A biphasic effect was observed in some but not all patients. There was poor correlation among the six patients between the blood glucose levels and serum insulin levels, and between the injected dose and the serum levels.