Skip to main content
Submitted by Dr S. Patel on 9 December 2017

In the second part of the series on drug interactions that persons with diabetes should watch out for, we talk of which medicines increase or decrease your blood glucose level and what you should watch out for.

Often persons with diabetes are on medications other than the diabetes drugs (oral or injectable). They may be on some medications for life for chronic conditions (such as thyroid, mental disorders etc) or acute conditions (such as allergies, infections etc). Drug interactions are known to occur between 2 sets of drugs. For such  patients, such interacts can be crucial as they can tamper the blood glucose levels. The specific pathway behind such mechanisms may not be fully known, but it is hypothesized that certain drugs cause a decrease in peripheral insulin sensitivity, increase the gluconeogenesis or decrease insulin secretion from the β cells of the pancreas. Concurrently, if the glucose levels seem uncontrollable, it would be wise to investigate whether a simultaneous or new medicine is responsible for it.

Let’s look at medications that are known to affect blood sugar levels.

Medicines that may raise blood glucose levels:

DRUG MECHANISM NOTE
Corticosteroids Opposes insulin action. Inhaled and topical steroids have a lower risk of affecting blood glucose than oral agents.
Diuretics (esp Thiazides) Opposes insulin action. Effects depend on dose and duration of use.
Atypical & Typical antipsychotics Insulin resistance, weight gain, diabetic ketoacidosis. Switching to low risk anti-psychotics is helpful.
Niacin/Nicotinic acid Opposes insulin action. Seen when doses > 2-3 mg/day used.
Oral contraceptives Opposes insulin action.  
Nifedipine (calcium channel blockers) Opposes insulin action. Lower dose & monitoring is helpful.
Phenytoin    
Clonidine Inhibits insulin secretion. Is effective in treatment of diabetic diarrhea and neuropathy.
Sugary syrups/lozenges (cough/cold/gastrointestinal medicines) Contain sugar alcohols or sweeteners. Check ingredients before purchase. Opt for sugar-free alternatives.
Fluroquinolone antibiotics Lowers magnesium levels --> Insulin resistence. Magnesium supplementation may be helpful.

Medicines that may lower blood glucose levels:

DRUG MECHANISM NOTE
Ace Inhibitors Increases insulin action. Appears to reduce risk of diabetic neuropathy.
MAO inhibitors Increases insulin signaling. Anti-depressants.
Fibrates Unclear. Used to lower triglyceride/cholesterol levels.
Quinine Increases insulin secretion. Malaria medication.
Salicylates Increases insulin secretion via prostaglandin synthesis inhibition. Is an analgesic and antipyretic!
Alcohol Inhibits hepatic glucose production and release.  
Beta-blockers Increases insulin action. Can also cause hyperglycemia!
Haloperidol (typical antipsychotic) Affects glucose tolerance. Used mostly in schizophrenia.
Pentamidine Early insulin release. Used in serious lung infection called PCP.

The drugs listed in the tables above, is not a complete list but mentions commonly used drugs. It is thus imperative to consult with your doctor before making any changes in your medications, whether it is taking a new drug, increasing dosage or stopping a drug.

Even non-prescription drugs such as cough syrups and alcohol can cause adverse/serious consequences. Checking with your doctor will avoid any drastic or unwanted changes in blood sugar levels and additionally help your doctor conclude if any blood glucose level fluctuation is due to potential drug interactions. All diabetes drugs have the potential to interact with other medications and if this results in hyper or hypoglycemia, it is a serious matter of concern. Such interactions can not only affect the efficacy of the diabetes drugs but also aggravate their side-effects.

Related Reading:
Diabetes Medicines and Drug Interactions with Other Medicines

Sick Day Management

Summary:

Consult your doctor before any changes in medications.
Beware of such interactions and monitor sugar levels regularly. 
Please contact your doctor for any adverse reaction or unexpected symptoms.

References:

  1. Which medications can worsen glycemic control?. Endocrine Today, March 2009. June Felice Johnson, BS, PharmD, FASHP, CMD-diabetes.
  2. https://www.healio.com/endocrinology/diabetes/news/print/endocrine-today/%7B5b64b6a4-1cfa-4fc5-b916-e8284a7945aa%7D/drug-interactions-with-diabetes
  3. Drug interactions with oral hypoglycaemic drugs. Gillian M. Shenfield. Aust Prescr 2001;24:83-51 Jul 2001 DOI: 10.18773/austprescr.2001.094
Community
Condition
Changed
Wed, 12/01/2021 - 20:29

Stories

  • A person in a white t-shirt holding his shoulder and signalling pain
    Why are My Shoulders Frozen and Painful
    People with type 2 diabetes are at an increased risk of developing frozen shoulder,  a sometimes severely painful condition in which there is reduced mobility of the shoulders, says Dr Girish Parmar, Consultant Endocrinologist, Nanavati Super Speciality Hospital. Is there a link between diabetes and muscle joint disorders? Yes there is a link between diabetes and musculoskeletal system. Diabetes is a metabolic disorder wherein the extra glucose in circulation sticks to the tissues.…
  • A young woman Ankita Bardhan standing in a purple and white printed dress in an open setting. The bottom of trees can be seen behind her
    "I Hate Diabetes From The Bottom Of My Heart!"
    Ankita Bardhan,29 from Kolkata has been living with Type 1 Diabetes since she was 13. Even though she would give anything for a non-diabetic life, that is not to be, and she has learnt to fight it every single day to respect the sacrifices her family has made for her and to acknowledge life as beautiful. Please tell us a bit about your condition, as in what you are suffering from : The condition is Type 1 diabetes. Essentially, in this condition, the insulin production from the pancreas of one’…
  • Can I Drink Wine If I Have Diabetes?
    This is a common question for people with diabetes. Dietitian Gerard Wong shares his inputs on whether persons with diabetes should have wine or alcohol and what to watch out for if they are on metformin or insulin.  Can red wine have adverse effects on persons with type 2 diabetes on metformin medication? Metformin is an oral anti-diabetic drug used to treat high blood sugar levels caused by type 2 diabetes. Let’s see how metformin works. It enhances the available insulin in your body and…
  • Living Better With Diabetes - A Webinar/ Live Q&A Series
    Diabetes Management can be challenging and distressing for a lot of families. In our Live Discussion sessions we talk to eminent doctors and patients for tips, vital information and motivation. In continuation of our series on Living Better With Diabetes we have with us Dr. Usha Sriram, Diabetes Specialist, Founder, Diwaaas.   Jayesh Shah, Type 2 Diabetes, Mumbai  Marianne de Nazareth, Type 2 Diabetes, Bengaluru Dr. Usha is passionate about the role of families in diabetes…
  • Image of some medicines and a book with the text Prediabetes
    Why You Should Take Prediabetes Seriously
    Prediabetes is the stage before Diabetes. Its your best chance of preventing the progression to diabetes if you make the necessary lifestyle changes. Read on to find out more about about Prediabetes. What is Prediabetes Prediabetes is when your blood glucose levels are higher than normal but not high enough to be diabetes. Simply put, prediabetes puts you at a higher risk of developing diabetes unless you change your lifestyle. According to the Center for Disease Control (CDC), 15 to 30 per…
  • Whole Wheat Chicken Momos
    Healthy Momos Recipe
    A healthy snack recipe good for everyone - especially people with diabetes contributed by Diabetes Awareness and You Chicken Momos Number of Momos: 20 Ingredients for Momos: Whole Wheat Flour: 75 gms Chicken: 250 gms Onion: 2 tbsp Oat flour: 75 gms Ginger: 1 tsp Garlic: 1 tsp Maida: 100 gms Oil: 200 ml Preparation of Momos:  Mix the flour together. Add some salt and 1 tsp oil. Mix it and make a dough out of it. Take some chicken portion. Steam it. Add some onion, ginger, garlic, soya…
  • A pair of hands, one holding a glucometer and the other a pill showing support of a caregiver to a diabetic patient
    Why Family Support Matters in Diabetes Management
    The theme for World Diabetes Day 2018 and 2019 is The Family and Diabetes. Lets look at how families supported our diabetes patients and the role of the family in the management, care and prevention of diabetes. Marianne de Nazareth, Bangalore My son, Andrew, who was studying at St. John’s Medical College, began to badger me to get my sugar checked. With his growing medical knowledge, he was becoming increasingly concerned about my sugar readings. He knew I had a huge craving for all things…
  • A dark haired woman with spectacles in a yellow and red sari and blouse sitting on a white sofa
    I Am Fighting Diabetes With A Smile
    Nandita Banerjee, 60 a certified Diabetes educator with DAY (Diabetes Awareness and You) in Kolkata, talks about how she has been battling this silent killer herself for the last 18 years with a  lot of success. Please tell us a bit about your condition. I have been suffering from Type 2 Diabetes for last 18 years, but have managed to keep myself disciplined and in control When were you diagnosed? In 2001 What were the early symptoms? It started with rashes in my whole body which I…
  • A pathologist with a mask covering his face holding a urine sample bottle
    What Does The Colour Of Your Urine Mean?
    Urinalyis or Urine Tests are often prescribed by doctors to detect certain conditions. Dr. Shital Raval explains what the results of a urine test mean, and the right way to collect a urine sample.   #KnowYourTest Series What is urinalysis? Urinalysis or Urine tests are a group of tests conducted on your urine that a doctor may prescribe. These tests are indicators of acute or chronic conditions or illnesses. It can also help detect insidious infections like urinary tract infections or…
  • Image Description: A head shot of Mr. Akhileshwar Sahay with spectacles as he shares his experience of living with Bipolar, Depression and COPD
    Bipolar or COPD - Never Lose Hope
    And QUIT SMOKING. Akhileshwar Sahay, a seasoned industry veteran, has been living with bipolar disorder for the last 2 decades. In this interview, he talks about his troubled journey with multiple chronic illnesses including COPD, Depression, Diabetes and his commitment to removing stigma related to mental illness.  How did your bipolar disorder start? What were the early symptoms? Bipolar disorder is not like influenza that it is diagnosed at once. Its roots are biological and I was…