Sick Day Management for Diabetics: Complete Protocol

Why Illness Makes Diabetes Harder to Manage

When you're sick, your body releases stress hormones like cortisol and adrenaline to fight the illness. Unfortunately, these hormones cause your liver to release extra glucose and make your cells more resistant to insulin. The result: blood sugar levels can skyrocket — even if you're barely eating a thing.

Whether you have Type 1 or Type 2 diabetes, having a clear sick day plan before you need it can prevent a medical emergency. This guide gives you a complete, step-by-step protocol.

Step 1: Never Stop Your Diabetes Medications

One of the most dangerous mistakes people with diabetes make when sick is stopping their insulin or oral medications because they aren't eating. Do not stop your medications without calling your doctor first. Even when fasting, your body still needs basal insulin or baseline medication to prevent dangerous highs or diabetic ketoacidosis (DKA).

If you take insulin, your provider may advise adjustments — but always get guidance before changing doses.

Step 2: Check Blood Sugar More Frequently

During illness, check your blood glucose every 2–4 hours, including overnight if necessary. This frequent monitoring helps you catch dangerous highs or lows before they become emergencies. Keep a log of your readings so you can report them accurately to your healthcare provider.

• Target range: Follow your provider's guidance, typically 80–180 mg/dL
• Alert level: Readings consistently above 240 mg/dL require immediate action
• Danger zone: Readings above 300 mg/dL or below 70 mg/dL require medical contact

Step 3: Check for Ketones (Type 1 and Some Type 2)

If you have Type 1 diabetes or use insulin for Type 2, check your urine or blood ketones whenever your blood sugar exceeds 240 mg/dL. Moderate to large ketones combined with high blood sugar can indicate DKA — a life-threatening emergency requiring immediate medical attention.

Keep ketone test strips in your sick day kit and replace them before they expire.

Step 4: Stay Hydrated

High blood sugar causes your kidneys to work overtime, pulling fluid from your body and increasing the risk of dehydration. Aim to drink at least 8 ounces of sugar-free fluid every hour while awake. Good options include:

• Water
• Sugar-free broth or bouillon
• Caffeine-free herbal tea
• Sugar-free electrolyte drinks

If you cannot keep fluids down due to vomiting, call your doctor right away. Dehydration accelerates DKA progression rapidly.

Step 5: Eat Carbohydrates Strategically

Even if you have no appetite, try to consume about 15–45 grams of carbohydrates every 3–4 hours to prevent hypoglycemia. Easy-to-tolerate sick day foods include:

• Toast or saltine crackers
• Applesauce
• Regular gelatin (not sugar-free, if blood sugar is low)
• Plain rice or mashed potatoes
• Popsicles with sugar if needed

If blood sugar is running high, stick to sugar-free liquids and low-carb options while staying hydrated.

Step 6: Choose Over-the-Counter Medications Carefully

Many common cold and flu remedies contain hidden sugars or ingredients that affect blood sugar. Avoid products with alcohol or high fructose corn syrup. Look for "sugar-free" or "diabetic-friendly" labels. Decongestants like pseudoephedrine can raise blood sugar and blood pressure, so use them cautiously and with your doctor's knowledge.

When to Call Your Doctor or Go to the ER

Contact your healthcare provider immediately if you experience any of the following:

• Blood sugar above 300 mg/dL that won't come down
• Moderate or large ketones in urine
• Vomiting or diarrhea lasting more than 6 hours
• Inability to keep food or fluids down
• Fruity-smelling breath, confusion, or rapid breathing
• Signs of severe dehydration: dry mouth, sunken eyes, dark urine

Call 911 or go to the emergency room if you lose consciousness, cannot be woken, or show signs of DKA.

Build Your Sick Day Kit Today

Prepare a sick day kit now, before illness strikes. Include: a blood glucose meter with extra strips, ketone test strips, a thermometer, sugar-free fluids, easy-to-digest carb snacks, your medication list, and your provider's emergency contact number. Review this kit every six months and replace expired items.

Having a plan transforms a potentially dangerous situation into a manageable one. Talk with your diabetes care team to personalize this protocol for your specific needs.