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What are the side effects of compounded Semaglutide?

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Patient's Query

Hello doctor,

I have started compounded Semaglutide with vitamin B12 and L-carnitine added. The pharmacy says this "custom blend" works better. However, I am experiencing unusual muscle cramps and heart palpitations. My blood pressure has dropped from 140/90 to 110/70—is this normal? I am also taking it with Ozempic and vitamin B12 sublingual tablets. Could these symptoms be due to interactions or improper dosing of the compounded formula? Should I adjust my electrolyte intake or monitor anything specific while using this combination?

Kindly guide.

Answered by Dr. Muhammad Anees Ur Rehman

Education:

MBBS

Professional Bio:

Graduated MBBS in 2019 Worked as House officer 2020-2021 Worked as Medical Officer 2022-2023 Currently working as Tele physician 2024-present

This doctor is not available for online consultations on the platform anymore.

Hello,

Welcome to icliniq.com.

I read your query and can understand your concern.

Your symptoms, muscle cramps, heart palpitations, and a drop in blood pressure—could be due to several factors related to the compounded Semaglutide blend, potential interactions, or electrolyte imbalances. The possible causes include:

  1. Electrolyte Imbalance: Semaglutide can cause dehydration and electrolyte shifts, especially when combined with L-carnitine, which may alter metabolism and fluid balance. Vitamin B12 supplementation itself is usually safe, but does not typically cause cramps or palpitations.
  2. Blood pressure drop: A decrease from 140/90 to 110/70 is significant. Semaglutide can reduce appetite and food intake, leading to lower sodium intake, which may contribute to hypotension.
  3. L-carnitine effects: It can increase heart rate in some individuals. It may contribute to muscle cramps, particularly if hydration or magnesium levels are low.
  4. Compounded medication concerns: Compounded versions of Semaglutide do not undergo the same FDA (Food and Drug Administration) approval process as Ozempic(GLP-1 receptor agonist) and could have variations in potency or purity. The added L-carnitine and vitamin B12 may alter the absorption or metabolism of the medication.

Here’s what you can do:

  1. Hydration and Electrolytes: Increase fluid intake and consider supplementing with electrolytes such as magnesium, potassium, and sodium. Coconut water, electrolyte tablets, or balanced hydration solutions can help.
  2. Monitor Blood Pressure: Check blood pressure regularly to ensure it does not drop too low, which could lead to dizziness or fainting.
  3. Monitor Heart Rate and Palpitations: If symptoms persist, consider an EKG (electrocardiogram) or an electrolyte blood panel.
  4. Consider a Medication Review: If symptoms continue, consult a doctor or pharmacist to evaluate the compounded formula. You may need to switch to an FDA (Food and Drug Administration) approved version (such as Ozempic or Wegovy) if the compounded blend is causing issues.

I hope this information helps you.

Thank you.

Medically reviewed by iCliniq medical review team
Published At May 20, 2025
Reviewed At June 3, 2025

Education:

MBBS

Professional Bio:

Graduated MBBS in 2019 Worked as House officer 2020-2021 Worked as Medical Officer 2022-2023 Currently working as Tele physician 2024-present

This doctor is not available for online consultations on the platform anymore.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Education:

MBBS

Professional Bio:

Graduated MBBS in 2019 Worked as House officer 2020-2021 Worked as Medical Officer 2022-2023 Currently working as Tele physician 2024-present

This doctor is not available for online consultations on the platform anymore.

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