Can Botox cause diarrhea and anxiety or am I just sick and neurotic?

It would be highly unlikely your symptoms are due to the Botox.  Patients sometimes complain of headaches after injections into the forehead, but this usually resolves on its own within a day.  Diarrhea would be an even more uncommon side effect.  Your headache could be from the sinus infection and the antibiotic in the z pak could have caused the diarrhea.  Best to contact the doctor who prescribed the z pak.

Hello,Let me start off by saying, Anxiety is common and by the sounds of things you didn't poison yourself! For one, the most common side effect of Botox is Headache. I've recently completed the largest study on Botox and reviewed nearly all the papers. So, this is possibly due to the Botox, but it will resolve in the vast majority of cases. Anxiety on the other hand, would almost never be directly caused by Botox. I would recommend you see your Family Physician and discuss this. But just to reassure you, the odds are your symptoms are unrelated to Botox. In the study I conducted, I assessed over 50 of the biggest studies on Botox and severe complications are extremely rare when used for cosmetic purposes.  Dr James P. Bonaparte, MD, MSc, FRCSCOtolaryngology - Head and Neck SurgeryFacial Plastic and Reconstructive SurgeryOttawa, Ontario, Canada

Botox is not the cause of your other symptoms.  I suggest seeing your primary care physician for an evaluation.  I wish you the best, Dr. Emer.