Generic lisdexamfetamine comes second with the added benefit of prodrug pharmacokinetics
According to the UK SmPC, the most common side effects include: Nausea (very common, affecting more than 1 in 10 people): Usually most pronounced during the first few weeks of treatment and often diminishes with continued use Diarrhoea (common, affecting up to 1 in 10 people): Typically mild to moderate in severity Vomiting (common): More frequent at higher doses Constipation (common): May occur alongside other gastrointestinal effects Abdominal pain or discomfort (common): Relatively frequent during treatment initiation Decreased appetite (very common): An expected effect related to the medication's action Dyspepsia/indigestion (common): May contribute to discomfort after eating Beyond gastrointestinal effects, other recognised adverse reactions include injection site reactions (redness, itching, or swelling at the subcutaneous injection site), fatigue , and dizziness

If you already deal with nausea, reflux, bloating, or low appetite after your injection, alcohol can push those symptoms further especially on an empty stomach
Most plans require: Your provider submits documentation to justify medical necessity