# What should I do if I miss a dose of diabetes medication?

Canonical page: https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication
Language: en
Category: diabetes
Publisher: ClinicsJo
Published: 2026-09-13T17:52:53.284Z
Content updated: 2026-09-13T17:52:53.284Z
Translation (ar): https://clinicsjo.com/ar/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication

If you miss a dose of diabetes medication, the most important step is not to make an individual decision to change or double the dose; you should consult your healthcare provider for precise instructions tailored to the specific medication you are taking [\[1\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S1>). The appropriate actions depend on the type of medication, the time since the missed dose, and your general health status, as medications differ in their speed of effect and how they work within the body [\[2\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S2>).

## Communicating with your doctor when a dose is missed

You must not change or stop your diabetes medications on your own [\[1\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S1>). Contacting your doctor or pharmacist as soon as you realize a dose has been missed is the safest option. When speaking with them, be sure to ask clearly: "What should I do if I missed this dose?" This information is essential to avoid any sharp fluctuations in blood sugar levels [\[2\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S2>). Your doctor is the only person qualified to determine whether it is necessary to take the missed dose as soon as you remember or to skip it until the next scheduled dose.

## Risks of self-adjustment

It is essential to avoid doubling the dose to make up for what you missed, as this may increase the risk of side effects [\[4\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S4>). For example, taking two doses of Metformin close together may increase the risk of common side effects such as nausea and diarrhea, and in rare cases, may lead to lactic acidosis [\[5\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S5>). Diabetes medications vary significantly; some aim to reduce glucose production in the liver, others increase insulin secretion, while insulin itself acts in different ways (rapid, intermediate, or long-acting) [\[2\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S2>). A simple error in managing a dose of insulin or oral medication may disrupt the balance of the glucose level you are aiming to maintain within the target range [\[1\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S1>).

## General guidelines for certain medications

For most medications, if the dose is delayed by less than two hours, it is generally acceptable to take it. However, if it is delayed by more than two hours, the advice depends on the frequency of the medication [\[4\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S4>):

- **If you take the medication once or twice a day:** Take the missed dose as soon as you remember, provided that the time for the next dose is not too close. Then continue taking the medication at the usual times [\[4\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S4>).

- **If you take the medication more than twice a day:** Skip the missed dose and wait until the next scheduled dose. Then continue taking the medication at the usual times [\[4\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S4>).

For Metformin, if you take it once daily and miss a dose, take it as soon as you remember unless it is too close to the time of the next dose. If you take it more than once a day and it is close to the time of the next dose, skip the missed dose and take the next dose at its usual time [\[5\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S5>). Do not take two doses to make up for a missed Metformin dose [\[5\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S5>).

## Monitoring sugar after a missed dose

After missing a diabetes medication dose, you should be vigilant for any signs of high or low blood sugar [\[4\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S4>). You may need to check your blood glucose levels more frequently than usual over the next 24 hours [\[4\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S4>). This monitoring helps you know if your sugar levels have risen above the target range. You can also review more details about how to generally handle medication protocols by reading [Understanding Diabetes Medications (Arabic)](<https://clinicsjo.com/ar/articles/understanding-diabetes-medications>), which explains the importance of adhering to your prescribed treatment plan to ensure your safety and avoid long-term health complications such as kidney disease or neuropathy [\[3\]](<https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#source-S3>).

## Medical references

- [Diabetes Medicines](<https://medlineplus.gov/diabetesmedicines.html>)

- [Insulin, Medicines, & Other Diabetes Treatments](<https://www.niddk.nih.gov/health-information/diabetes/overview/insulin-medicines-treatments>)

- [Women and Diabetes -- Diabetes Medicines](<https://www.fda.gov/consumers/womens-health-topics/women-and-diabetes-diabetes-medicines>)

- [Advising on missed or delayed doses of medicines – NHS SPS - Specialist Pharmacy Service – The first stop for professional medicines advice](<https://sps.nhs.uk/articles/advising-on-missed-or-delayed-doses-of-medicines/>)

- [Metformin: a medicine to treat type 2 diabetes - NHS](<https://www.nhs.uk/medicines/metformin/>)

General health education; not a substitute for individualized clinical assessment.

Citation URL: https://clinicsjo.com/en/faq/what-to-do-if-you-miss-a-dose-of-diabetes-medication#answer