Based on the available information, there is no evidence to suggest that alcohol's impact on pregnancy decreases with the use of prenatal vitamins.

Prenatal vitamins are essential for ensuring that a pregnant individual and their developing fetus receive the necessary nutrients for healthy growth and development [3]. However, prenatal vitamins do not mitigate the negative effects of alcohol consumption during pregnancy.

Alcohol consumption during pregnancy can lead to fetal alcohol spectrum disorders (FASDs), which can cause physical, behavioral, and learning problems in the affected individual [1][2]. The Centers for Disease Control and Prevention (CDC) recommends that pregnant individuals avoid alcohol consumption entirely [2].

In summary, while prenatal vitamins are crucial for a healthy pregnancy, they do not reduce the negative effects of alcohol consumption during pregnancy. Pregnant individuals should avoid alcohol consumption entirely.

Sources:

* <https://www.drugpatentwatch.com/p/tradename/ALCOHOL>
* <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086808/>
* <https://www.nichd.nih.gov/health/topics/pregnancy/conditioninfo/prenatal-care>