Guide to Understanding Pediatric Sedation Side Effects

Pediatric dental sedation side effects are temporary physiological responses to calming medications, ranging from mild grogginess and nausea to paradoxical irritability. Clinical research supports that postoperative nausea and vomiting in pediatric patients is high [1] (Urits et al., 2020). While most effects dissipate within 2 to 24 hours, understanding the specific timeline for Nitrous Oxide, Oral, and IV sedation ensures a stress-free recovery for North Carolina children at Village Family Dental.

Why do mood swings occur after sedation?

Medical literature supports that one in four children have significant negative behaviors 1-2 weeks after discharge [2] (Pearce et al., 2018). One of the most surprising side effects for parents is paradoxical irritability. Instead of waking up calm and sleepy, some children wake up extremely fussy, crying, or even thrashing. This is not a sign of pain or a bad reaction. Rather, this is the brain’s way of returning to homeostasis as the sedative wears off. In our St. Paul’s clinic, this is most often seen with oral conscious sedation. Because the child feels disoriented, they may become frustrated. As a parent, the best thing you can do is stay calm, speak in a low voice, and provide a familiar comfort item, like a stuffed animal from home. This phase usually passes within 30 to 45 minutes as the medication continues to clear.

How to stop post-operative nausea

Nausea and vomiting are the most common physical side effects of dental sedation, but they are also the most preventable. Sedation medications relax the muscles of the stomach and the esophagus. If your child has a full stomach, the epiglottis, which keeps food down, relaxes, which can lead to vomiting.

This is why we enforce a strict “Nothing by Mouth” protocol for our North Carolina patients. By ensuring your child’s stomach is empty before arriving at our office, you drastically reduce the risk of vomiting during or after the procedure. If your child is prone to motion sickness, let us know in advance. We can often adjust the sedation dosage or provide specific instructions to keep their stomach settled.

Comparing side effects and recovery of sedation:

What is the amnestic effect?

While we typically think of side effects as negatives, the amnestic effect is important for pediatric dentistry. Clinical evidence supports that peri-procedural amnesia of the dental procedure is common following sedation [3] (Viana et al., 2021). Certain sedatives used at Village Family Dental, such as Midazolam, create a temporary window where the brain does not store short-term memories into long-term storage. This means that even if your child was slightly aware during the visit, they likely will not remember the events an hour later. Clinical research supports that this prevents the fear cycle. By removing the memory of the clinical sounds and smells, we ensure that your child does not develop a lifelong phobia. They leave our St. Paul’s office feeling like they have had a long nap, making them much more cooperative for their next routine cleaning.

What is relaxed breathing?

During sedation, it is normal for a child’s breathing to become slower and shallower. While this is the intended effect, it is also the side effect that requires the most professional vigilance. At Village Family Dental, we use hospital-grade Pulse Oximetry and Capnography. These tools measure the exact percentage of oxygen in your child’s blood and the amount of carbon dioxide they exhale while breathing. If their breathing becomes too relaxed, our monitors alert us instantly. For St. Paul’s parents, this means you can rest easy knowing that while your child is sedated, an entire team of specialists is dedicated to monitoring them.

The lack of motor skills after sedation

As the sedative leaves the bloodstream, it lingers in the muscles, leading to a side effect known as ataxia. Your child might feel like their legs are weak, and their depth perception may be slightly off. For the first 24 hours following sedation, we recommend keeping your child on the ground at your home.

• No Stairs: Carry your child up and down stairs, or block them off with a baby gate.
• No Outdoor Play: Skip the trip to the parks or playgrounds until the next day.
• Supervised Hydration: Ensure they drink from a regular cup rather than a straw, as the suction can sometimes cause a dry socket.

FAQs

1. Why is my child crying after waking up from sedation?

This is known as paradoxical excitement. As the sedative wears off, the brain can feel confused. In combination with lip numbness, children often express this confusion through crying.

2. Can my child eat pizza right after sedation?

We recommend waiting until the local anesthesia has completely worn off. If they eat while numb, they may accidentally bite their lip or tongue severely.

3. Is a fever after sedation normal?

A low-grade fever (under 100°F) can sometimes occur as the body reacts to the procedure and the medication. However, if the fever tops 101°F or is accompanied by heavy swelling, call our office immediately.

References 

[1] Urits, I., Orhurhu, V., Jones, M. R., Adamian, L., Borchart, M., Galasso, A., & Viswanath, O. (2020). Postoperative Nausea and Vomiting in Paediatric Anaesthesia. Turkish journal of anaesthesiology and reanimation, 48(2), 88–95. https://doi.org/10.5152/TJAR.2019.67503 

[2] Pearce, J. I., Brousseau, D. C., Yan, K., Hainsworth, K. R., Hoffmann, R. G., & Drendel, A. L. (2018). Behavioral Changes in Children After Emergency Department Procedural Sedation. Academic emergency medicine : official journal of the Society for Academic Emergency Medicine, 25(3), 267–274. https://doi.org/10.1111/acem.13332 

[3] Viana, K. A., Moterane, M. M., Green, S. M., Mason, K. P., & Costa, L. R. (2021). Amnesia after Midazolam and Ketamine Sedation in Children: A Secondary Analysis of a Randomized Controlled Trial. Journal of clinical medicine, 10(22), 5430. https://doi.org/10.3390/jcm10225430