You are hundreds of times more likely to suffer an adverse reaction to taking an aspirin than you are from having a chiropractic adjustment. Most people don’t realize that there are more than 100,000 adverse reactions each year from taking a simple aspirin, while there are fewer than 100 adverse reactions to chiropractic adjustments. When you consider that there are more than 3 million people being adjusted in a single year, the risk is almost non existent.