Histamine drugs are used to treat a variety of conditions such as allergies and autoimmune disorders. However, in some cases, they may also cause adverse effects such as drowsiness, headache, and stomach problems. In contrast, antihistamines work by blocking the effects of histamine in the body, which can alleviate symptoms such as itching, hives, and swelling. Other antonyms for histamine drugs include immune suppressants, anti-inflammatory drugs, and corticosteroids. These medications can help to reduce inflammation, pain, and swelling without causing the side effects associated with histamine drugs. Additionally, lifestyle changes such as avoiding triggers and maintaining a healthy diet can also help to manage these conditions.