Lecanemab Infusion Side Effects: Chills & Aches

Discover the side effects of lecanemab infusion, including chills and body aches. Learn how these effects can be managed and what to expect during treatment.

Greg Rowland

10/29/20251 min read

Lequembi 200mg package
Lequembi 200mg package

Just before midnight, the chills started. I turned on my Linus blanket and Linda put two blankets on top of it. Additionally, there were two cats on top of the blankets. The chills were manageable at that point.

I also began having muscle aches, primarily in my legs.

At about 2:00 a.m., the chills suddenly stopped. Like flipping a switch. Linda and I believe this short period of chills means that my body is adjusting and becoming acclimated to Lecanemab.

The muscle aches continued throughout the night. The pain is subsiding now.

All in all, the side effects were very manageable. Today will be a day of rest.