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What to do if…
your blood sugar reading is low and keeps dropping despite eating

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

Treat a low, dropping reading as urgent. Take 15 grams of fast-acting carbohydrate if you can swallow safely, re-check in 15 minutes, and call 911 now if you are getting worse, cannot swallow safely, may pass out, have had a seizure or blackout, or the reading keeps dropping despite treatment.

Do not do these things

  • Do not drive, walk alone outside, shower, cook, or do anything where fainting or confusion could injure you.
  • Do not delay help if the number keeps falling or you feel worse.
  • Do not go to sleep while the reading is low, dropping, or not clearly improving.
  • Do not take more insulin or other glucose-lowering medicine to “correct” anything while you are low.
  • Do not start with slow snacks such as chocolate, peanut butter, or high-fat foods if the reading is dropping; they may work too slowly.
  • Do not drink alcohol.
  • Do not force food or drink into your mouth if you are very drowsy, choking, confused, or might pass out.

What to do now

  1. Get physically safe and get another person involved. Sit or lie down. If you are alone, call or text someone to come to you now, keep the phone with you, and unlock the door if you can do that safely.

  2. Check the number, but do not let checking delay treatment. If you use a CGM and it shows a fast drop, do a fingerstick if you can, because CGM readings can lag behind blood glucose. For many people with diabetes, especially people using insulin or some diabetes medicines, below 70 mg/dL is usually treated as low; use your own care plan if it gives you a higher treatment threshold.

  3. Take 15 grams of fast-acting carbohydrate now if you can swallow safely. Use something quick and measurable, such as:

    • glucose tablets or glucose gel,
    • 4 ounces, about 1/2 cup, of fruit juice,
    • 4 ounces, about 1/2 cup, of regular non-diet soda,
    • another quick sugar you know you can swallow safely.

  4. Re-check in 15 minutes. If the reading is still below 70 mg/dL, still below your personal treatment threshold, or still dropping, take another 15 grams of fast-acting carbohydrate and re-check again in 15 minutes.

  5. Call 911 now if any danger sign is present. Do this if you are getting confused, very drowsy, weak, unable to swallow safely, unable to keep carbs down, alone and worsening, having trouble walking or seeing clearly, or if you have had a seizure or blackout. While waiting, lie on your side if very drowsy and keep the phone near you.

  6. Use glucagon if eating or drinking is not safe. If someone is with you, you have glucagon, and they can follow the package instructions, they should give it and call 911. They should not put food or drink in your mouth if you are very drowsy, unconscious, choking, or unable to cooperate.

  7. After the reading is clearly rising, reduce the chance of another drop. Once you are awake, improving, and able to eat, have a longer-acting carbohydrate snack or meal, especially if your next meal is not soon.

  8. Get urgent medical advice if this was hard to treat or keeps coming back. This is especially important if you use insulin, take a sulfonylurea, have been drinking alcohol, have been vomiting, exercised more than usual, or cannot keep your blood sugar up. If you are not on diabetes medicines and you are getting confirmed low readings, seek same-day medical advice.

What can wait

  • You do not need to work out the exact cause while the reading is low and dropping.
  • You do not need to change insulin doses, pump settings, or diabetes medicines during the active low unless an emergency clinician or your diabetes care plan tells you to.
  • You do not need to eat a full meal before treating the low; fast sugar and re-checking come first.
  • You do not need perfect notes right now. If you can, keep a simple record of the time, reading, what you took, and whether the number rose.

Important reassurance

A dropping low can feel frightening and can make it hard to think clearly. Using fast sugar, re-checking, involving another person, and calling 911 when it is not responding are safety-first steps, not an overreaction.

Scope note

These are first steps for the next minutes to hour. Recurrent, severe, unexplained, or hard-to-treat lows may need later review with a diabetes clinician or another medical professional.

Important note

This guide is general information, not medical advice, diagnosis, or a substitute for professional care. If your blood sugar will not rise despite fast carbohydrate, you cannot swallow safely, you are worsening, or you have severe symptoms, seek emergency care immediately.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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