Alcohol consumption can indeed interfere with the effectiveness of antibiotics in treating infections. When alcohol is consumed while taking antibiotics, it can lead to various adverse effects such as increased side effects, reduced effectiveness of the medication, and in some cases, even nullifying the antibiotic's ability to combat the infection. Alcohol can also impact the liver's ability to metabolize antibiotics properly, potentially leading to increased toxicity levels in the body. Therefore, it is generally recommended to avoid alcohol while on a course of antibiotics to ensure the best possible outcome in treating infections.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ALCOHOL
[2] https://www.healthline.com/health/antibiotics-alcohol
[3] https://www.alcoholrehabguide.org/alcohol/drinking-drugs/antibiotics/