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A MyEpilepsyTeam Member asked a question 💭
Northport, NY

I heard that phenobarbital can cause bone loss? Has anyone heard this?

December 2, 2025
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MyEpilepsyTeam

Has anyone heard that phenobarbital can cause bone loss?

Yes, this concern is valid. Some antiepileptic drugs, including older medications, have been linked to bone abnormalities and bone loss, especially with long-term use. These medications can affect your bone mineral density (BMD), which measures the strength and Show Full Answer

Has anyone heard that phenobarbital can cause bone loss?

Yes, this concern is valid. Some antiepileptic drugs, including older medications, have been linked to bone abnormalities and bone loss, especially with long-term use. These medications can affect your bone mineral density (BMD), which measures the strength and thickness of your bones.

Research has shown that long-term use of certain antiepileptic drugs can increase fracture risk significantly and may lower your bone density. This can contribute to conditions like osteoporosis, where bones become weak and brittle.

Why does this happen?

Some antiepileptic medications can cause bone loss through several mechanisms:
* Effects on the liver that impact bone health
* Lowering vitamin D levels
* Encouraging bone turnover while blocking new bone formation

What you can do:

If you're concerned about bone loss while taking phenobarbital, talk with your neurology team. They can help by:
* Monitoring for side effects
* Recommending vitamin D supplements
* Adjusting your dosage if needed
* Discussing whether switching to another medication might be appropriate

Regular bone density screening may also be recommended, especially if you have other risk factors like being over 50, having low body weight, or minimal exercise.

December 2, 2025
A MyEpilepsyTeam Member

Yes, it can cause bone loss because it deprives your body of vitamin D.

December 3, 2025
A MyEpilepsyTeam Member

It' differs per person my opinion

December 2, 2025
A MyEpilepsyTeam Member

@A MyEpilepsyTeam Member
Phenobarbital is the only med that I want to stay on. Actually I would like no meds. I don’t think that will be possible. But I think I may have to get off it. Bcse of the bone thinning and weakening. I don’t know what I will do. I was on Dilantin for 30 years and that causes bone loss too so now I learned that pheno can cause bone loss too.

December 4, 2025
A MyEpilepsyTeam Member

I take D3 and Caltrate

December 3, 2025

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