Digestion problems can stem from various causes, so the right medicine depends on your specific symptoms. For heartburn or indigestion, over-the-counter antacids or H2 blockers (like Famotidine) can help. For bloating or gas, simethicone or probiotics may offer relief. If you have constipation, a fiber supplement or mild laxative might be suitable. However, because ?digestion problems' is a broad term, it is best to avoid self-medicating. Please consult a doctor for an accurate diagnosis and a tailored treatment plan, especially if you experience severe symptoms like persistent pain, vomiting, or unexplained weight loss.