For food poisoning, acidity, and nausea, your priority is hydration. Sip on Oral Rehydration Salts (ORS) or clear fluids. For acidity, an over-the-counter antacid or an H2 blocker like Famotidine can help. For nausea, a doctor may prescribe an antiemetic like Ondansetron. Avoid self-medicating with anti-diarrheal medicines (like loperamide), as they can trap toxins in your body. Rest your stomach and transition to bland foods (like toast or rice) when ready. Please consult a healthcare professional for a personalised prescription. Seek immediate medical attention if you experience a high fever, bloody stools, or cannot keep fluids down.