Alcohol should not be mixed with the following medications… See more…

explained.

Additionally, you should not combine alcohol with anticoagulants (blood thinners), NSAIDs (nonsteroidal anti-inflammatory drugs), medications for gastrointestinal problems, as well as medications for the heart and blood vessels. All of these threaten ulcers, bleeding, and heart rhythm problems.

You can of course drink vitamins and alcohol together, but then the former will not be beneficial. And allergy sufferers who are on antihistamines should generally refrain from using it.