If your blood-alcohol level exceeds .08 you are considered drunk in the Bay State. If you’re driving a commercial vehicle, the threshold is .04. Your weight has a lot to do with how many drinks you can consume. Here’s how it breaks down:

.06 = Judgement is impaired

.08 = Impairment of muscle coordination, driving skills

.10 = Deterioration of reaction time and control

.12 = Vomiting usually occurs

.15 = Balance and movement impaired

.20 = Most people begin to experience blackouts

.45 = Most people die

Source: Awareawakealive.org; Massachusetts Drunk Driving Laws