Alcohol first affects your: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Alcohol first affects your: Answers Vision. Speech. Judgment. Balance. Explanation A person's ability to exercise good judgment is one of the first things impaired by alcohol. It is never a safe idea to ride a motorcycle after consuming alcohol in any amount.