Does the alcohol tolerance drop after not drinking for a while?

When I drank more I would need like 2 shots to feel something and 3 to 4 to get a buzz or drunkish, I drank a few ounces of beer and I can feel something, it's been a while since I drank anything alcoholic so is it possible for a drinking tolerance to drop?
Does the alcohol tolerance drop after not drinking for a while?
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