My father has been diabetic for five years and is on insulin (4 units in the morning and 6 units at night). Every three months, he experiences recurrent episodes of vomiting, weakness, and mild respiratory distress, accompanied by high blood sugar (269 mg/dL), despite all other test reports being normal. What medications or insulin dose adjustments are recommended to prevent these recurrent episodes and stabilise his blood sugar?

Your father's symptoms of vomiting, weakness, respiratory distress, and high blood sugar suggest he may be experiencing periodic diabetic ketoacidosis (DKA), which is highly treatable. His current low insulin doses likely need upward adjustment or a transition to a basal-bolus insulin regimen. I highly recommend consulting his endocrinologist to safely adjust his daily insulin doses. During these episodes, it is crucial to check his blood or urine for ketones. His doctor can also establish a 'sick-day plan,' which outlines how to adjust insulin and stay hydrated during illness to prevent these recurrent episodes. Please do not alter his doses without direct medical supervision.