Navigating travel with diabetes

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As the number of people who travel continues to increase, so too will the number of travelers with diabetes. This increase will come with new and more frequent requests for medical travel advice. This article equips clinicians with the tools to address patient concerns about travel and to empower patients to be prepared for emergency situations both abroad and at home. This includes encouraging patients to obtain a travel letter, bring enough supplies for the trip, and have a plan to manage time-zone changes.


  • Patients should pack all diabetes medications and supplies in a carry-on bag and keep it in their possession at all times.
  • A travel letter will facilitate easy transfer through security and customs.
  • Patients should always take more supplies than needed to accommodate changes in travel plans.
  • If patients will cross multiple time zones during their travel, they will likely need to adjust their medication and food schedules.



Travel, once reserved for wealthy vacationers and high-level executives, has become a regular experience for many people. The US Travel and Tourism Overview reported that US domestic travel climbed to more than 2.25 billion person-trips in 2017.1 The US Centers for Disease Control and Prevention (CDC) and the US Travel Association suggest that, based on this frequency and the known rate of diabetes, 17 million people with diabetes travel annually for leisure and 5.6 million for business, and these numbers are expected to increase.2

It stands to reason that as the number of people who travel continues to increase, so too will the number of patients with diabetes seeking medical travel advice. Despite resources available to travelers with diabetes, researchers at the 2016 meeting of the American Diabetes Association noted that only 30% of patients with diabetes who responded to a survey reported being satisfied with the resources available to help them manage their diabetes while traveling.2 This article discusses how clinicians can help patients manage their diabetes while traveling, address common travel questions, and prepare patients for emergencies that may arise while traveling.


Provider visit before travel: Checking the bases

Template for a travel letter.

Figure 1. Template for a travel letter.

Advise patients to schedule an appointment 4 to 6 weeks before their trip.3 At this appointment, give the patient a healthcare provider travel letter (Figure 1) and prescriptions that the patient can hand-carry en route.3 The provider letter should state that the patient has diabetes and should list all supplies the patient needs. The letter should also include specific medications used by the patient and the devices that deliver these medications, eg, Humalog insulin and U-100 syringes4 to administer insulin, as well as any food and medication allergies.

Prescriptions should be written for patients to use in the event of an emergency during travel. Prescriptions for diabetes medications should be written with generic names to minimize confusion for those traveling internationally. Additionally, all prescriptions should provide enough medication to last throughout the trip.4

Advise patients that rules for filling prescriptions may vary between states and countries.3 Also, the strength of insulin may vary between the United States and other countries. Patients should understand that if they fill their insulin prescription in a foreign country, they may need to purchase new syringes to match the insulin dose. For example, if patients use U-100 syringes and purchase U-40 insulin, they will need to buy U-40 syringes or risk taking too little of a dose.

Remind patients that prescriptions are not necessary for all diabetes supplies but are essential for coverage by insurance companies. Blood glucose testing supplies, ketone strips, and glucose tablets may be purchased in a pharmacy without a prescription. Human insulin may also be purchased over the counter. However, oral medications, glucagon, and analog insulins require a prescription. We suggest that patients who travel have their prescriptions on file at a chain pharmacy rather than an independent one. If they are in the United States, they can go to any branch of the chain pharmacy and easily fill a prescription.

Work with the patient to compile a separate document that details the medication dosing, correction-scale instructions, carbohydrate-to-insulin ratios, and pump settings (basal rates, insulin sensitivity, active insulin time).4 Patients who use an insulin pump should record all pump settings in the event that they need to convert to insulin injections during travel.4 We suggest that all patients with an insulin pump have an alternate insulin method (eg, pens, vials) and that they carry this with them along with basal insulin in case the pump fails. This level of preparation empowers the patient to assume responsibility for his or her own care if a healthcare provider is not available during travel.

Like all travelers, patients with diabetes should confirm that their immunizations are up to date. Encourage patients to the CDC’s page ( to check the list of vaccines necessary for their region of travel.4,5 Many special immunizations can be acquired only from a public health department and not from a clinician’s office.

Additionally, depending on the region of travel, prescribing antibiotics or antidiarrheal medications may be necessary to ensure patient safety and comfort. We also recommend that patients with type 1 diabetes obtain a supply of antibiotics and antidiarrheals because they can become sick quickly.

Packing with diabetes: Double is better

Carry-on checklist for travelers with diabetes
Encourage patients to create a checklist of diabetes supplies and medications needed for the duration of their trip (Table 1).4

The American Diabetes Association recommends that patients pack at least twice the medication and blood-testing supplies they anticipate needing.3 Reinforce to patients the need to pack all medications and supplies in their carry-on bag and to keep this bag in their possession at all times to avoid damage, loss, and extreme changes in temperature and air pressure, which can adversely affect the activity and stability of insulin.

Ask patients about the activities they plan to participate in and how many days they will be traveling, and then recommend shoes that will encourage appropriate foot care.4 Patients with diabetes should choose comfort over style when selecting footwear. All new shoes should be purchased and “broken in” 2 to 3 weeks before the trip. Alternating shoes decreases the risk of blisters and calluses.4

Emergency abroad: Planning to be prepared

It is crucial to counsel patients on how to respond in an emergency.

Fast facts in case of emergency

Encourage patients with diabetes, especially those who use insulin, to obtain a medical identification bracelet, necklace, or in some cases, a tattoo, that states they use insulin and discloses any allergies.3 This ensures that emergency medical personnel will be aware of the patient’s condition when providing care. Also suggest that your patients have emergency contact information available on their person and their cell phone to expedite assistance in an emergency (Table 2).

Urge patients to determine prior to their departure if their health coverage will change once they leave the state or the country. Some insurance companies require patients to go to a specific healthcare system while others regulate the amount of time a patient can be in the hospital before being transferred home. It is important for patients to be aware of these terms in the event of hospitalization.4 Travel insurance should be considered for international travel.

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