Drug Interaction Report

Lanreotide Injection and Gallium Ga 68 Dotatoc: Interaction Details

Name: Lanreotide Injection and Gallium Ga 68 Dotatoc Interaction
Creator: Dr. Brian Staiger, PharmD, BCPS

A pharmacist-reviewed analysis of the Lanreotide Injection and Gallium Ga 68 Dotatoc interaction: the documented clinical effects, severity rating, onset, mechanism, and management considerations, with cited references throughout.

AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature

Lanreotide Injection

Somatuline Somatuline Depot®

Gallium Ga 68 Dotatoc

No brand names on record

Medically reviewed by

Dr. Brian Staiger, PharmD, BCPS

Updated Aug 8, 2026

Editorial policy · Data sources

Interaction severity

Major

Potentially serious — often needs a change or close monitoring.

Minor

Moderate

Major

Contraindicated

How we grade severity & evidence

Severity levels

Contraindicated: These should generally not be used together.
Major: Potentially serious — often needs a change or close monitoring.
Moderate: Can be significant — usually manageable with monitoring.
Minor: Usually limited clinical impact.

Evidence grades

Established: Well documented — supported by controlled studies or strong clinical data.
Probable: Good supporting evidence, though not definitively proven.
Suspected: Some evidence suggests this interaction, but it is not well established.
Possible: Limited or conflicting evidence; the interaction may occur.
Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.

Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.

Of 92 documented Lanreotide Injection interactions, 90 are rated major — including this one.

Worried about symptoms right now? Contact your pharmacist or prescriber, or call Poison Control at 1-800-222-1222 (US). Call 911 for an emergency.

Onset

unspecified

Evidence

theoretical

Severity

Major

What happens

Decreased gallium Ga 68 dotatoc efficacy

Interaction Deep Dive

Non-radioactive somatostatin analogs bind to the same somatostatin receptors as gallium Ga 68 dotatoc. Discontinue short-acting somatostatin analogs 24 hours before imaging with gallium Ga 68 dotatoc. If using long-acting somatostatin analogs, image with gallium Ga 68 dotatoc just prior to somatostatin analog dosing¹.

Why it happens (mechanism)

Interference with the binding of gallium Ga 68 dotatoc to somatostatin receptors leading to decreased efficacy

Common questions

Can I take Lanreotide Injection and Gallium Ga 68 Dotatoc together?

Decreased gallium Ga 68 dotatoc efficacy Always confirm with your pharmacist or prescriber before making any change.

How serious is the Lanreotide Injection and Gallium Ga 68 Dotatoc interaction?

It is rated major. Potentially serious — often needs a change or close monitoring.

How quickly could this interaction happen?

The documented onset is "unspecified". The timing of this interaction is not well characterized.

How strong is the evidence for this interaction?

The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.

Questions for your pharmacist

Does my dose of Lanreotide Injection or Gallium Ga 68 Dotatoc need adjusting while I take them together?
What symptoms should prompt me to call you or my prescriber right away?
Does the timing of my doses matter for this combination?
Is there a safer alternative to one of these medications for me?

References (1)

Product Information: Ga 68 DOTATOC intravenous injection, Ga 68 dotatoc intravenous injection. UIHC-PET Imaging Center (per FDA), Iowa City, IA, 2019.

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Lanreotide Injection

Keep reading about Lanreotide Injection

All Lanreotide Injection interactions (92) Lanreotide Injection drug information

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Gallium Ga 68 Dotatoc

Keep reading about Gallium Ga 68 Dotatoc

All Gallium Ga 68 Dotatoc interactions (3)

Also serious with: Octreotide Octreotide Injection

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HelloPharmacist doesn't license one of the big commercial interaction databases, so what you'll find here is not a complete list of every known drug interaction. Instead, each entry is researched, analyzed, and written up individually — documented from the published literature, reviewed by a pharmacist, and cited so you can check every source yourself.

If a combination isn't listed here, it means we haven't documented it yet — never that it's safe. For screening a full medication list, we recommend pairing this site with a comprehensive tool like the Drugs.com Interaction Checker and, most importantly, a review by your own pharmacist. For a deep, plain-English, fully sourced explanation of a specific documented interaction — that's exactly what we built this for.

This information is for education, not a substitute for professional medical advice. Do not start, stop, or change any medication without talking to your pharmacist or prescriber.