<s>[INST] I have been taking ChatDoctor for 23 days. In the last week I have experienced a tightening of the chest with a pain that starts in my back and moves to my sternum. It happens in the afternoon between lunch and dinner. I also sometimes have what feels like a lump in my throat. My husband is on day 13 and is starting to experience the same thing. Any ideas? We are on the 500 calorie diet also and adhere strictly to the Simeons protocol. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. ChatDoctor is hormone. It can cause gastritis, chest pressure, chest tightness, bloating etc. So possibility of Chat Doctor related side effects is more likely. So take pantoprazole tablet on empty stomach twice daily. You will mostly improve with this. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>