<s>[INST] hello My father is a 53 years old man that has HTN (140/90) for about 6 years and now he is using Amlodipine 5mg each day; also he has nephrolithiasis too and his prostate has enlarged and he has problem in urination and now for solving this problem he uses tamsulosin each day too; I want to know that is it taking both this 2 tablet dangerous for him and cause hypotension or not? [/INST] Hi,There is a little risk if hypotension while taking both medications Amlodipin and Tamsolusin, just monitor his blood pressure closer. Take care </s>