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    • 2 hours, 5 minutes ago
      René Wagner likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      I hate formulary changes mid year. They should not be allowed!
    • 2 hours, 6 minutes ago
      René Wagner likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      I will be possibly switching from Humalog to Novalog next year. There is NO Medicare Part D plan in my county that now covers Humalog. Complicated by the fact that I use a Humalog specific Smart Pen, it will be one more hassle in T1 world. My endo will submit a formulary exception request next year. My hoarded supply of cartridges will carry me through while waiting for the response 🤞🏻I cannot believe that this is the broken system that we have to settle for in the richest country in the world.
    • 11 hours, 18 minutes ago
      NANCY NECIA likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      My doctor switched me without telling me from Humalog to novolog and told me it was due to insurance. I’m on Medicare and I never saw anything that said that was necessary. They call me periodically to see how I’m doing and I told them I didn’t appreciate being switched without being told. I thought initially it was a mistake when I picked it up at the pharmacy but they said that’s what the doctor ordered. Then the next visit, he told me all my issues with insulin switching and preauthorization holdups was my fault basically because he says “I have the wrong insurance”. Like I’m going to NOT use Medicare. My opinion? I think I have the wrong doctor, but it’s a hassle to switch.
    • 11 hours, 19 minutes ago
      NANCY NECIA likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Not this year, but in 2026, I need to switch from Humalog to Novolog.
    • 13 hours, 49 minutes ago
      mojoseje likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      NEVER accerptable or appropriate. Nobody's healthcare should ever be determined by a third party's profit margin(s) to determine what we are forced to take.
    • 15 hours, 51 minutes ago
      Phyllis Biederman likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      My doctor switched me without telling me from Humalog to novolog and told me it was due to insurance. I’m on Medicare and I never saw anything that said that was necessary. They call me periodically to see how I’m doing and I told them I didn’t appreciate being switched without being told. I thought initially it was a mistake when I picked it up at the pharmacy but they said that’s what the doctor ordered. Then the next visit, he told me all my issues with insulin switching and preauthorization holdups was my fault basically because he says “I have the wrong insurance”. Like I’m going to NOT use Medicare. My opinion? I think I have the wrong doctor, but it’s a hassle to switch.
    • 16 hours, 9 minutes ago
      Lawrence S. likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Insurance won't cover and it was several hundred dollars.
    • 16 hours, 10 minutes ago
      Marty likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Had to, no. But Medicare is adding coverage for FIASP in '26 so it will be "bye, bye, bye, bye, bye" to Lyumjev!
    • 17 hours, 2 minutes ago
      Gerald Oefelein likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Had to, no. But Medicare is adding coverage for FIASP in '26 so it will be "bye, bye, bye, bye, bye" to Lyumjev!
    • 17 hours, 16 minutes ago
      Scott Rudolph likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Had to, no. But Medicare is adding coverage for FIASP in '26 so it will be "bye, bye, bye, bye, bye" to Lyumjev!
    • 1 day, 13 hours ago
      eherban1 likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      I use InPen and it's great. Except they aren't keeping up with iOS so you now have to unlock your phone and open the app to check IOB instead of simply looking at the home screen. You can tell when app developers aren't users, otherwise they'd know how much of a pain this is when you check 50 times a day
    • 1 day, 14 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Insurance won't cover and it was several hundred dollars.
    • 1 day, 15 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Glucagon is $425 for me on Medicare. It is cheaper to get an ambulance! I have an expired one that will work if I ever need it, but I won't.
    • 1 day, 15 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No. During the past century I threw out many glucagon doses about 5 years after each had expired - having never used a single glucagon dose.. This century, two dose kits were disposed of and never used. At this point, in my opinion, with modern tools for accurately monitoring one's body glucose levels, AND common awareness of how one is feeling, severe low BGL can be easily avoided thus not needing "emergency' glucagon. NOTE WELL!!! what I wrote in the last sentence, does NOT apply to the very young, and some newly diagnosed who have not yet mastered insulin dosing and who have not yet been accustomed to recognizing low or quickly dropping BGL.
    • 1 day, 15 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      I do because it Costc me over $300 to replace it. Too expensive.
    • 1 day, 15 hours ago
      John Barbuto likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      Medicare has added FIASP for 2026! Besides the great news of being able to use this once again, it is one of the few fast acting insulins that works with the inPen. I am considering doing that in the new year
    • 1 day, 15 hours ago
      John Barbuto likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      Been using fiasp for 2 years (in the UK) and it's significantly better than novorapid. Would highly recommend to everyone, especially if you find your insulin a bit slow to act.
    • 1 day, 16 hours ago
      Lozzy E likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      Medicare has added FIASP for 2026! Besides the great news of being able to use this once again, it is one of the few fast acting insulins that works with the inPen. I am considering doing that in the new year
    • 1 day, 19 hours ago
      Ahh Life likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      The last Glucagon prescription that I purchased was 15 years ago. Now it's way too expensive because my insurance doesn't cover it. They just want us to either die or use ambulance service to use or send us to ER. Pretty stupid to me. I've had T1D for 52 years and never needed it really. Only 3 times during early morning hypos in 2015-16 I needed rescue to wake me.
    • 2 days, 1 hour ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      My experience over the past 65 years is that a sugary drink and patience will bring me out of a low satisfactorily. If I’m unconscious, as has happened four or five times over that period, the EMTs know what to do.
    • 2 days, 1 hour ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Glucagon is $425 for me on Medicare. It is cheaper to get an ambulance! I have an expired one that will work if I ever need it, but I won't.
    • 2 days, 1 hour ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No I haven't a glucagon in yeans. Reason being:, every time I had a prescription, the glucaagon was never used and expired.
    • 2 days, 1 hour ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No. During the past century I threw out many glucagon doses about 5 years after each had expired - having never used a single glucagon dose.. This century, two dose kits were disposed of and never used. At this point, in my opinion, with modern tools for accurately monitoring one's body glucose levels, AND common awareness of how one is feeling, severe low BGL can be easily avoided thus not needing "emergency' glucagon. NOTE WELL!!! what I wrote in the last sentence, does NOT apply to the very young, and some newly diagnosed who have not yet mastered insulin dosing and who have not yet been accustomed to recognizing low or quickly dropping BGL.
    • 2 days, 1 hour ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      I do because it Costc me over $300 to replace it. Too expensive.
    • 2 days, 1 hour ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Insurance won't cover and it was several hundred dollars.
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    If you use an insulin pump, please select the option which most accurately completes the statement for you: The last time I changed my pump site, I filled my reservoir/cartridge/pod with enough insulin to last me…

    Home > LC Polls > If you use an insulin pump, please select the option which most accurately completes the statement for you: The last time I changed my pump site, I filled my reservoir/cartridge/pod with enough insulin to last me...
    Previous

    When treating a low (i.e, less than 70 mg/dl or 3.9 mmol/l) how often do you over treat, resulting in high blood glucose levels?

    Next

    How well do you understand the details of your health insurance coverage (e.g., which medications are covered, how much a service will cost, the steps you need to take about getting a service or product covered, etc.) Please select the number or statement that best represents your knowledge.

    Sarah Howard

    Sarah Howard has worked in the diabetes research field ever since she was diagnosed with T1D while in college in May 2013. Since then, she has worked for various diabetes organizations, focusing on research, advocacy, and community-building efforts for people with T1D and their loved ones. Sarah is currently the Senior Marketing Manager at T1D Exchange.

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    37 Comments

    1. LizB

      I had been filling it to the maximum 300 units but once or twice it seemed like the insulin was becoming less effective after 8 days. I know insulin is approved for 7 days in a pump but I usually don’t have problems going longer. Now I try to fill it with enough to last a week. I still end up with enough for 8 days most of the time. I hate filling reservoirs so I try to get away with as much as I can!

      4
      3 years ago Log in to Reply
    2. George Lovelace

      1st Fill is just short of 300, Second Fill is short of 275 as there is insulin remaining from 1st Fill. I replace the Cartridge next.

      3 years ago Log in to Reply
    3. Brian Johnson

      I change my sites exactly every 3 days, but change my reservoir every 6 to 7 days. I very seldom ever change them together at the same time.

      3 years ago Log in to Reply
      1. Bea Anderson

        What pump do you use? I used to use Medtronic pump. This sounds practical and a bit of a timesaver.

        3 years ago Log in to Reply
      2. Lori COLLINS

        Same here. I use a Medtronic 770G and 300 units of insulin lasts 14–16 days. I cange my infusion set every 3 or 4 days (or whenever I have unexplainable, unresponsive highs). I use the same tubing for the whole reservoir. No problems w/ insulin getting old, stale, or less effective even though I live in sunny Florida and spend a fair amount of time outdoors.

        3 years ago Log in to Reply
    4. Gerald Oefelein

      I fill my reservoir with 250 units of insulin and use until less than 20 units remain. I do not reuse reservoir.

      3 years ago Log in to Reply
    5. Nevin Bowman

      I am supposed to change my site every 2 days, but I already only fill my reservoir halfway, which lasts 3 days.

      3 years ago Log in to Reply
    6. AimmcG

      I fill the reservoir until it’s full. How long it lasts varies but I would say 5 days?

      1
      3 years ago Log in to Reply
    7. Kris McDonald

      Omnipod has a 100 unit minimum per pod. I often have between 20 and 30 units left when pod has to be changed on day 3.

      3 years ago Log in to Reply
      1. Bea Anderson

        I use Omnipod 5. According to the manual it’s minimum is 85 units. That is when the beep occurs. I continue filling to 120 and have little left crossing the 3 day finish line!

        1
        3 years ago Log in to Reply
    8. Bea Anderson

      “Exactly” might be better termed my goals! 3 days is best goal. My goal also is to have enough insulin to exceed 3 days. While never going to 4 days, my insulin needs vary.

      2
      3 years ago Log in to Reply
    9. Carrolyn Barloco

      My Tandemx2 holds 3ml in its reservoir. I fill it and how long it lasts varies with what I eat and do. I use every unit of insulin prior to changing my infusion set.

      4
      3 years ago Log in to Reply
    10. Lawrence S.

      I try for 3 days, but it is never “Exactly.” In the summer time I fill less because of the heat. In the winter, I fill slightly more because I am less worried about the insulin durability.

      1
      3 years ago Log in to Reply
    11. Hark87

      More than 2 but less than 3. I run daily, and my sites (tandem) sometimes get irritated or start to fall off due to sweat (summer months, stomach/thigh locations). I fill to 120 units and sometimes have a little leftover. It really sucks having to change the site that frequently, and the fact that out of pocket costs are beyond ridiculous, but the pump is literally a godsend and I’d be lost without it.

      1
      3 years ago Log in to Reply
    12. Donald Cragun

      I change my site every three days. I replace my reservoir when it is empty (and fill it with a 300 units of insulin).

      1
      3 years ago Log in to Reply
    13. anj1832

      This question doesn’t make sense to me, maybe someone can explain it better. When I change a pump site (infusion set) I do not change my cartridge as well. I only change my cartridge when it runs out of insulin.. then I fill it up and it lasts however many days it takes.

      4
      3 years ago Log in to Reply
      1. Trina Blake

        Me too

        1
        3 years ago Log in to Reply
    14. Amanda Barras

      I always fill mine up with 300 U but it only lasts me 2 days. I have to refill again to get past 2 days or change everything out every other day.

      3 years ago Log in to Reply
    15. Linda Zottoli

      In summer months, I try to fill my reservoir to last about 3 days: I have had trouble with insulin not working as well after getting hot. But in cooler months (like now) I fill it to at least twice that. But, in either case, I change reservoirs when it gets down to 4 units, which only occasionally occurs when I’m changing the infusion set every 3 days.

      So, I accumulate extra tubing. One year I decorated an extra small Christmas tree with it: I though it was cute, but my family wasn’t impressed. I’ve also used it to improvise a clothes line while traveling.

      3 years ago Log in to Reply
    16. Mike S

      In winter, I fill my Omni with the max and after the 3 days rescue any leftover insulin and use it in next pod. Sometimes I have none left. (thanksgiving!) other times I have re-used over 100 units. Seriously depends on what’s happening in life. (Summer is different. I’m not sure if it’s because I’m outside, but the insulin never seems as effective by day 3, so I’m less likely to fill to the max. Don’t want to waste that liquid gold.)

      1
      3 years ago Log in to Reply
    17. Jeannie Hickey

      Like others, I fill my reservoir full & use it for about 9 days, changing the site every 3 days, reusing the tubing. Then I refill that reservoir again, 3-4 times. If reservoir & site happen at the same time I’ll even add extra insulin that will fill the tubing.

      2
      3 years ago Log in to Reply
      1. Stephen Woodward

        Diabadass, for sure.

        3 years ago Log in to Reply
    18. Mark Schweim

      I RARELY change/refill the cartridge when I change sites. Last time I changed sites I didn’t change pump cartridges until the following day.
      But when I fill the cartridge, I put around 230 units in the cartridge and that’s enough to last me somewhere between 7 and 10 days.
      Even when I lived in Southern Alabama working outside in +100 weather, even when pump cartridge didn’t need changing/refilling until day 11, I never noticed any difference in the Insulin effectiveness on day 10+ compared to the effectiveness of the Insulin straight from the Insulin vial.

      3 years ago Log in to Reply
    19. Retired and glad

      I fill my reservoirs to the limit, which is 300 units. Occasionally I need to change the site because it gets “blown” and the insulin is less effective. Most of the time, however, I let it go until the insulin in the reservoir runs out without any serious effect. Typically it lasts five or more days.

      1
      3 years ago Log in to Reply
    20. Janis Senungetuk

      I fill the cartridge with approximately 260 units and use it until there are less than 10 units left. I change the infusion set ever 4 days, usually twice before changing the cartridge. My activity level and amount that I eat has completely changed over the past three years because of pandemic isolation. When that changes it will effect my insulin usage and length of time between cartridge changes.

      3 years ago Log in to Reply
    21. Carol Meares

      I am on Omnipod 5. If there is a significant amount of insulin leftover I will add it to my next pod. There is usually not enough to bother.

      1
      3 years ago Log in to Reply
    22. Beckett Nelson

      I just fill it. It could last up to 6days

      1
      3 years ago Log in to Reply
    23. Ms Cris

      More than 2, less than 3 days for the following reasons:
      1) my tandem pump runs hot, but tandem insists it’s fine. I can never carry it in a pocket, etc., Only on a clip, exterior with air flow. My insulin deteriorates in less than 48 hours. No question. By then I’m running a higher temp basal. If I change the insulin, but not the site, and forget to try off the higher temp basal….I go low within an hour.
      2) I need only 12u per day. Unfortunately I have to fill with 60u plus 10 for tubing. So my pump wastes half of my insulin.
      I sometimes try to go 3 days, but really not worth the consequences.

      3 years ago Log in to Reply
    24. Molly Jones

      It was nice to see the responses. I can now not waste so much of my insulin as my average daily amount is about 14units and I have to put at least five days into the cartridge for it to be accepted. The site can become irritating after four days or more.
      I will try to fill it and use my cartridge more than once.

      3 years ago Log in to Reply
    25. Becky Hertz

      I put in 250 units at a time. Sometimes it lasts 2-3 days and sometimes it lasts 4-5 days. Obviously, I don’t eat the same thing everyday nor does my body utilize insulin the same everyday.

      2
      3 years ago Log in to Reply
    26. mbulzomi@optonline.net

      I answered, more than three but less than four days. However, I have skipped my lunch many times is the process of losing weight, so I may be able to squeeze four days if I need it to change the site when my Sensor is also due to be changed. If you are wearing a sensor and it needs to be changed every 10 days, but the Pump, sute needs to be changed every three days. So, I try to change my site every 3 1/3 days. Great for the vendors!!!

      3 years ago Log in to Reply
    27. Lenora Ventura

      My site changes do not correspond with my cartridge refills. I change them both when they are empty/need to be changed.

      2
      3 years ago Log in to Reply
    28. Stephen Woodward

      The insulin manufacturer documentation states that it is good from 6-9 days in a cartridge depending on the pump approved insulin. For 30 years I have fill all cartridges full up every time I fill a cartridge. Sites are always changed every 3 days or so.

      3 years ago Log in to Reply
    29. Sealani Weiner

      I don’t really calculate how many days; I just look to see when it is running out. Sometimes the only way I know to change is the low insulin alert. In the US, I would have to change every two or three days because my skin gets raw. I’m in Mexico and my skin doesn’t get irritated, so I just went four days before changing the site today.

      3 years ago Log in to Reply
    30. Bwarschoff

      I fill the cartridge completely and use until it runs out or until it will be difficult to change if I don’t change the cartridge now.

      3 years ago Log in to Reply
    31. PamK

      Unfortunately, I have to fill my cartridges with enough insulin to last me at least 5 days. If I fill it with less than that it won’t reach the minimum amount needed for the pump to recognize the new cartridge.

      3 years ago Log in to Reply
    32. T1D4LongTime

      Tandem’s cartridge and infusion set design amounts to a lot of waste if you fill more than the 3 days (that’s all I can get a site to last these days). That’s assuming you don’t just change the site and not the cartridge (which is what I do). I load 200 units (5-6 days), so 2 site changes. Will account for high BG days and/or illness needs.

      3 years ago Log in to Reply

    If you use an insulin pump, please select the option which most accurately completes the statement for you: The last time I changed my pump site, I filled my reservoir/cartridge/pod with enough insulin to last me... Cancel reply

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