Should I continue or wean if I feel like I'm drunk after the first pill?

You did not write in the content of the question what drug is meant. If you mean the preparation Existent tagged next to the question, please read on. "Feeling of alcoholic intoxication" is a possible side effect of the drug Existent, it occurs statistically in no more than 1 in 10 people. Sometimes these types of side effects are more severe at the beginning of therapy and weaken or pass with time. Their occurrence does not have to be associated with the need to stop therapy, but if you experience effects of high severity, it is worth consulting a psychiatrist. According to the documentation of the drug, if the patient experiences psychomotor impairment: "Do not drive a car, operate complex machines or perform potentially dangerous activities until the effect of this drug on the ability to perform the above activities has been determined." I enclose information that may be useful: https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane