Published on 7 October 2025

Teplizumab could delay the onset of type 1 diabetes by around three years.

The Medicines and Healthcare products Regulatory Agency (MHRA) has approved teplizumab (Tzield) to delay the onset type 1 diabetes.

The recommendation follows reports that Stage 3 type 1 diabetes could be delayed by an average of three years in adults and children aged 8 years and older with Stage 2 type 1 diabetes.

Teplizumab is the first approved immunotherapy for type 1 diabetes in the UK.  

Stage 3 type 1 diabetes is when people usually begin to experience blood glucose problems and are diagnosed with the condition, which often requires lifelong insulin treatment.  

Teplizumab is used in people with Stage 2 type 1 diabetes – an earlier stage of the condition where individuals are at high risk of progressing to Stage 3. 

A statement from MHRA said: “This medicine has been approved through the International Recognition Procedure (IRP). The IRP allows the MHRA to take into account the expertise and decision-making of trusted regulatory partners for the benefit of UK patients.  

“Teplizumab is administered via intravenous infusion once daily for 14 days. 

“The MHRA conducts a targeted assessment of IRP applications and retains the authority to reject applications if the evidence provided is not considered sufficiently robust. 

“A full list of side effects can be found in the Patient Information Leaflet (PIL) or the Summary of Product Characteristics (SmPC), available on the MHRA website within 7 days of approval. 

“As with any medicine, the MHRA will keep the safety and effectiveness of teplizumab under close review. 

“Anyone who suspects they are having a side effect from this medicine is encouraged to talk to their doctor, pharmacist or nurse and report it directly to the MHRA Yellow Card scheme, either through the website or by searching app stores for MHRA Yellow Card.”

Read more about type 1 diabetes

Read the DRWF diabetes information leaflet Signs and symptoms of diabetes

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