My husband is currently in the hospital for his first IVIG series. Â Mestinon and Prednisone were ineffective in controlling his double vision and drooping eyelids. Â He has now completed two infusions of a four infusion regimen, which is being administered at 10:00pm. Â He is being pre-medicated with Benadryl. Â When he wakes up after the infusion, he is experiencing throat tightening, difficulty with swallowing, esophageal burning, thick post nasal drip, and dizziness, which are being attributed to the Benadryl. Â His doctor says that administering Benadryl is part of the IVIG regimen, and there are really no alternatives. Â Has anyone else experienced similar side effects, and if so, what did you do about it? Â So far the IVIG has had little effect on his MG symptoms, but he wants to complete the series to see if it will help. Â But the Benedryl side effects are making this a horrendous experience.