Q. I was put on Lipitor to control cholesterol and found it shot my blood sugar through the roof. My doctor suggested switching to Crestor. Would this drug also affect blood sugar?

A. You are not the first person to note that some cholesterol-lowering medicines might raise blood sugar levels. Another reader reported that after taking Crestor, his type 2 diabetes numbers also “went through the roof.” In addition, he reported: “my hands, feet and arms tingled so much I could hardly stand it.”

The official prescribing information for both Lipitor and Crestor mention elevated blood sugar as a possible side effect. A large study of over 17,000 patients (the Jupiter Trial) reported a higher incidence of diabetes in the subjects taking Crestor (New England Journal of Medicine, Nov. 20, 2008).

Researchers are not sure whether this is a real complication of statin-type drugs or just a coincidence. In the meantime, it is still important to control cholesterol since both it and diabetes can increase the risk of heart attacks and strokes.

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  1. John Brown

    Statins raised my blood sugar so I stopped taking them. Ya’ll know the deal. If it walks like a Duck and quacks like a Duck. It might be a Duck !!! Daaaa

  2. Kevin

    Started fenofibrate on Friday, my lowest blood sugar readings have been 127 fasting after prior day starving myself. Prior to taking Fenofibrate fasting sugars were 89-120. I have stopped taking Fenofibrate as of today to see if my numbers lower. I can not take statins because of muscle breakdown, leading to complete lack of the ability to sit or stand.

  3. DeeDee

    I have been diagnosed with diabetes a year ago. At first I did not want to take the meds (Metformin 500mg 1x daily) which the doctor had suggested. My sugar levels were between 119-140 highest. But I was not taking the meds everyday. Only at times when my levels were over 120. I started taking Metformin on a daily basis now as suggested from my doctor because I would be causing other problem health wise down the road; such as kidney, liver, maybe strokes etc.. I got scared. However since I been on the meds and watching what I eat, my sugar level has went up to 190-240 everyday. Cannot seem to get it down. Do not know what’s going on, except I have started the Metformin daily. I think I am going to plan a three day exercise program and change diet again.

  4. Warrior

    I contracted necrotizing fasciitis, flesh eating bacteria, several years ago. I had several clots during my hospital stay. I had to take Coumadin and my dr overdosed me. I developed a left temporal bleed which turned into a stroke. I developed type 2 diabetes from the stroke. Metformin was no good, switched to stronger meds and became insulin dependent. Prior to the stroke I was taking Lipitor with no increases in blood sugar and I had lab at least twice a week from my pt/INR issues. After the stroke my sugar went crazy. 2 weeks ago, I was away from home, ran out of Lipitor and my sugar dropped below 100. My low would always run 250 and as much as 400, I now take zeta which hasn’t raised my blood sugar. I haven’t taken any oral meds or insulin in over a week now. I believe I can live with the zeta and not be constantly worrying about my blood sugar or having to take insulin with me everywhere I go.

  5. deb

    I was started on Lipitor 40 mg-developed severe tendonitis in shoulder, and just didn’t feel well. So I quit taking it. Well, decided I better do as instructed and about 9 months later-yes arm discomfort almost completely gone, I restarted it.

    Well, tendonitis back with a bang, increasing muscle spasms and pain. now. a1c and blood glucose levels high-(been great before) and I feel like crap. Had some chest pressure with increased pulse, heart beating harder and increased shortness of breath. So 2 days ago stopped it again. Will never ever take it again. Heart rate normal-no hard beating heart.

    I will need time for muscle symptoms to go away and will have a1c redone at a later time. Please do not stop or start meds without your doctors knowledge. I am a Registered Nurse, but I still discussed this with my doctor before doing, and I agree with above writer-lets deal with this by diet.

    I am going to stock up on the old walnuts and garlic. I will also have cholesterol rechecked at a later date. Have to say statins scare me now and I will be more aware of people’s symptoms and the meds they take.

  6. Karen

    I am a Type 2 diabetic diagnosed in 2007 when I had my aortic valve replaced. Received a bevy of new drugs following surgery – among them 40mg Lipitor. Lipitor cut to 20mg in 2009 and I was on a (500mg) minimal dose of Metformin. Diet and exercise (and a little weight loss) kept morning glucose readings bouncing around 134 – 155.
    In 2010 I tore my hamstring in an accident and was unable to do a lot of exercise. A1c went from 7.1 to 8.1. Doctor took me to 2000mg Metformin and glyburide to bring down blood glucose, but hypoglycemia became an issue. Changed doctors.
    A week ago my new doctor agreed to cut my Lipitor to 10mg (and watch cholesterol levels). My morning readings went from the 150s to the 130s. Yesterday, 2 hours after a meal, I got shaky and had a reading of 51. This morning, after indulging on a lot of sugar yesterday to get out of hypoglycemia, my reading was 101. Now, my Metroprolol was cut in half a day before but I can’t imagine it would have caused a reaction that quickly.
    I’m heading back to my doctor next week.

  7. Johnna M.

    My husband has been a type 2 Diabetic since 2010, controlled with Metformin & diet. Then on 8/15/2012 he had 2 Unstable Angina episodes. Was put in hospital, test ran & went in for an Angiogram (doctors thought Stents needed to be done). Got in & found nothing they expected. His arteries are Massively dilated, with plaque & Aneurysms!
    So he was put on Lipitor 80mg from the 1st day in the hospital. His blood sugars starting rising, so doctor changed him to Crestor & Tricor, blood sugars went even higher. So next he was put on Novolog Insulin before meals & Lantus at bedtime. Sugars still off the charts.
    Finally went to an Endocrinologist & they raised his insulin amount + 2,000mg of Metformin a day. He is now up to 35+ sliding scale before meals & 60+ sliding of Lantus before bed (he started @ 5units of Novolog & 10mg of Lantus). Well we now have gotten a new Cardiologist @ Stanford & he told us YES the Lipitor started your sugars rising & then Crestor has kept it up. So he has cut his Crestor in half. So we are now going to see the Endocrinology dept @ Stanford.
    He has had the tingling/numbness in his feet/lower legs, can’t sleep at all, back & shoulders ache all the time. His blood sugars are now high & never coming down. Low for him as of right now is 250, and can be 400+ when wakes up in the morning. We are praying the new Endocrinologist @ Stanford will help us out cause he is very ill & needs someone to help him. His diet is too the tee for a Diabetic + heart patient. So even if your doctor tells you NO its not the Statins, YES IT IS!! You know your body, listen to it. Any comments, suggestions or information is very welcome.

  8. Wfd

    I started using Lipitor (previously another type for 15 years)a year ago and after 6 months saw elevated blood sugar levels. 6 months later higer yet blood sugar levels which caused my doctor to put me an oral meds to lower it. I’m not happy about this to say the least!! I’m 65 years old and have not changed my lifestyle, I do take meds for high blood pressure as well.

  9. ccshah

    You do not need to take any drugs for Cholesterol
    177 is under 200 —
    just change some diet –reduce saturated fats
    and eat more Garlic and walnuts –everyday

  10. slrd

    I am and insulin dependent diabetic and within 24 hours or me starting the generic for lipitor my blood sugar numbers more than doubled and I have worked hard to get them down to about 280 (they were over 320 for over a month). Last night I decided to not take the drug and my waking sugar level was at 117. This is a very scary drug for diabetics. I really don’t think I am going to continue taking this medication.

  11. GMM

    Since my husband was switched to Crestor his blood sugar levels have raised over 100 – 150 points in one month. His doctor changed his BP med and then switched to Crestor from Simvastatin. The doctor claims it is a co-incidence but he has not changed his eating habits. His blood sugar was under such good control before Crestor.

  12. jms

    Saturday I forgot to take my Lipitor. A rare occurrence. Sunday by glucose reading was 121 down from 148. How possible is this? I will discuss with my doctor this month. May try Zocor. I am currently on 40 mg lipitor and 5 mg zetia and last cholesterol test was 114. A1C was 7.1 and doctor not concerned if not greater than 8.0.

  13. Ken

    Please I find my self in the same situation please let me know if you have found alternative to these statin drug thanks

  14. RL

    DG –
    Yes, it’s a conundrum! If your experience is like mine (and that’s a big “if” since everyone’s different), a trend toward reversal of any Lipitor-driven postprandial increases will be evident pretty soon after stopping it.
    After taking Lipitor for approx 6 months about 8 years ago it appeared to be increasing my postprandials. At my request my doctor switched me to Pravachol (pravastatin) which has not been implicated in increased glucose (in fact, some researchers have suggested that unlike other statins it may actually help improve insulin sensitivity). But even 80mg of Pravachol didn’t lower my LDL nearly as much as 10mg of Lipitor. So after 6 more months I switched to then-new Crestor.
    The irony is that the large study of Crestor released in late 2008 is what finally started bringing some attention to possible statin-induced negative effects on glucose metabolism. I still see some likely glucose-increasing effects from the Crestor, but not as bad as what I had seen with the Lipitor. It’s been mitigated even further since I switched my 10mg Crestor to every-other-day about 18 months ago. The LDL-lowering is somewhat less than when I was taking it every day, but still substantial. Since lowering the Crestor dosage I’ve also been taking daily Pantethine (a derivative of the B-vitamin Pantothenic Acid). After a couple months that brought it down a couple more points with no adverse effects, but it’s a bit pricey for a supplement, and needs to be taken with food.

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