The appropriate treatment for hypoglycemia depends on how severe the episode is and whether the person can safely swallow. Most mild to moderate episodes, where blood sugar drops below 70 mg/dL, can be treated at home by eating a small amount of fast-acting carbohydrate. Severe episodes where someone loses consciousness require emergency glucagon or hospital care.
The 15-15 Rule for Mild Episodes
The standard approach for treating low blood sugar at home is called the 15-15 rule: eat 15 grams of fast-acting carbohydrate, then wait 15 minutes for it to reach your bloodstream. If you don’t feel better after 15 minutes, eat another 15 grams. Check your blood sugar to confirm it has returned to a safe range.
Fifteen grams of carbohydrate is a smaller amount than most people expect. Any of the following will get you there:
- Glucose tablets: 3 to 4 tablets, depending on the brand (check the label)
- Fruit juice: about 4 ounces (half a cup)
- Regular soda: about 4 ounces (not diet)
- Honey: 1 tablespoon
- Hard candy: a few pieces, depending on size
The key word is “fast-acting.” You want simple sugars that your body absorbs quickly. Foods high in fat or protein, like chocolate or peanut butter, slow digestion and won’t raise blood sugar fast enough when you need it. Save those for a follow-up snack after your levels stabilize.
Once your blood sugar is back above 70 mg/dL, eat a small meal or snack that includes protein and complex carbohydrates. This helps prevent another drop. A piece of toast with peanut butter or cheese and crackers works well.
When Someone Can’t Swallow Safely
The 15-15 rule only works if you’re conscious, alert, and able to swallow without choking. If someone with low blood sugar is confused, semiconscious, having a seizure, or fully unresponsive, never try to put food or liquid in their mouth. The risk of choking or inhaling food into the lungs is too high. A person must have an intact gag reflex and the ability to protect their own airway before receiving anything by mouth.
This is where glucagon comes in. Glucagon is a hormone that signals your liver to release stored sugar into the bloodstream. It works in the opposite direction of insulin, and it can raise blood sugar even when someone is unconscious.
Glucagon: What It Is and How It Works
Glucagon used to come only as a powder that had to be mixed with liquid before injection, a process that was stressful and error-prone in an emergency. Today there are much simpler options.
Auto-injector pens come pre-mixed and ready to use. You press the device against the thigh or upper arm and it delivers the dose automatically, with no mixing required. Nasal glucagon eliminates needles entirely. It’s a dry powder sprayed into one nostril while the person is lying on their side. The person doesn’t need to inhale or be conscious for it to work.
For adults and children weighing more than 44 pounds, the standard emergency dose is 1 mg. Children under 44 pounds receive a half dose (0.5 mg). Most people respond within 10 to 15 minutes. Once the person wakes up and can swallow safely, give them a carbohydrate snack to keep their blood sugar from dropping again.
If you or someone in your household uses insulin or takes medications that can cause low blood sugar, keeping a glucagon kit at home and knowing how to use it before an emergency happens is important. Show family members, roommates, or coworkers where it’s stored and walk them through the steps while everyone is calm.
What Happens at the Hospital
When someone arrives at an emergency room with severe hypoglycemia, the medical team can raise blood sugar directly through an IV line using a concentrated sugar solution. This works faster than glucagon because it delivers glucose straight into the bloodstream. Hospital teams also monitor blood sugar levels repeatedly afterward and can provide a continuous sugar drip if levels keep falling.
Hospital treatment is typically needed when glucagon isn’t available, when someone doesn’t respond to glucagon within 15 minutes, or when hypoglycemia keeps recurring despite treatment. Prolonged or repeated severe episodes can sometimes point to a medication issue, a missed meal pattern, or an underlying condition that needs investigation.
Recognizing the Severity
Knowing which treatment to use starts with recognizing how severe the episode is. Mild hypoglycemia feels like shakiness, sweating, a fast heartbeat, hunger, or irritability. You’re fully aware something is wrong and can treat yourself. This is a 15-15 rule situation.
Moderate hypoglycemia adds confusion, difficulty concentrating, blurred vision, or slurred speech. You may still be able to eat or drink, but you might need someone else to help you. If you can swallow safely, fast-acting carbohydrate is still the first step. If there’s any doubt about your ability to swallow, the helper should use glucagon instead.
Severe hypoglycemia means loss of consciousness, seizures, or being too confused to cooperate. This is a glucagon situation, and someone should call emergency services if the person doesn’t improve within 15 minutes or if no glucagon is available.
Preventing Repeat Episodes
Treatment gets you through an immediate crisis, but repeated lows signal something in your routine needs adjusting. Common triggers include skipping meals, exercising more than usual without adjusting food intake, drinking alcohol on an empty stomach, or taking too much insulin relative to what you ate.
Keeping fast-acting carbohydrates within reach at all times reduces the risk of a mild episode turning severe. Glucose tablets in your bag, juice boxes in your car, and a glucagon kit at home create a safety net. Wearing a medical ID bracelet helps bystanders and first responders treat you correctly if you can’t speak for yourself.
If you’re experiencing low blood sugar more than a couple of times a week, or if your lows are happening without warning symptoms, that pattern is worth discussing with whoever manages your diabetes care. Medication timing, doses, and meal plans can often be adjusted to reduce how frequently episodes occur.