Can I take botulinum toxin for dystonia in pregnancy?

Question

Hello doctor,

My sister is 33 years old and has been diagnosed with cervical dystonia. She has been receiving botulinum toxin injections every few months to control her neck muscle spasms. She is now planning to conceive and is worried whether these injections can harm the fetus if she becomes pregnant. Please let us know the following:

Should she stop the treatment before trying to conceive, and if so, how long should she wait before planning pregnancy?
She is concerned because stopping the injections may lead to severe neck pain, stiffness, and worsening of her symptoms. Are there any safe treatment options available for managing cervical dystonia during pregnancy?
Also, can pregnancy-related hormonal changes make dystonia worse?
She is also anxious about the delivery. Will cervical dystonia or neck spasms make normal vaginal delivery difficult, or would a cesarean section be safer?
Additionally, if she decides to delay pregnancy and use contraception, which birth control method would be most suitable for her?
Do hormonal contraceptive pills interact with dystonia medications?
Lastly, she is worried about breastfeeding in the future. Can botulinum toxin or other dystonia medications pass into breast milk and affect the baby?

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query.

Your sister’s concerns are completely valid, and it is very wise that she is planning ahead. Botulinum toxin injections for cervical dystonia (a condition where the neck muscles tighten or contract on their own, without the person trying to move them) have not been extensively studied in pregnancy.

The toxin stays local at the injection site, with very little reaching your bloodstream. That keeps the theoretical risk to your baby low. But safety data here are still limited. So most neurologists won't recommend botulinum toxin during pregnancy unless your symptoms are severe and disabling.

If she is planning to conceive, it is generally advised to stop the injections in advance, ideally waiting for at least one full injection cycle (about three to four months) so that the effect of the medication wears off completely before pregnancy. There are some case reports of women who accidentally received injections in early pregnancy without any harm to the baby, but as a rule, caution is still the safest approach.

Most women with cervical dystonia can still deliver vaginally. The condition affects neck muscles, not the pelvis. But if neck pain or rigidity makes labor positioning too hard, her obstetrician might plan a cesarean section instead (delivery through a surgical cut in the abdomen and uterus, rather than through the vagina) based on her comfort and safety.

Oral contraceptives don't interact with botulinum toxin. If she's worried about hormones affecting her dystonia, a copper IUD or another long-acting non-hormonal option works well.

Overall, the best approach is for her to plan pregnancy in coordination with both her neurologist (a doctor who treats brain, nerve, and muscle disorders) and obstetrician (a doctor who manages pregnancy, childbirth, and the health of the mother and baby), so her treatment can be individualized to maintain symptom control while ensuring the best possible safety for both her and the baby.

I hope this helps.

Kindly revert so I can assist you further.

Thank you.