As part of a drug trial, a survey was done to gather information about the participants' experiences with side effects. Here are the results . 662 people participated in the drug trial in all 365 of the participants had anxiety 67 of the participants had fatigue , but had neither anxiety nor dizziness 131 of the participants had dizziness, but had neither anxiety nor fatigue 143 of the participants had anxiety, but had neither fatigue nor dizziness of the participants had both anxiety and fatigue, but didn't have dizziness 109 of the participants had both anxiety and dizziness, but didn't have fatigue 616 of the participants had at least one of these three side effects (anxiety, fatigue, dizziness)