Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in the upper body; shortness of breath; and sudden dizziness, lightheartedness, or passing out;PLP_2sst4ssd_1422,PLP_4sst5asd_1424,PLP_5sst1dst7asd1dasd_317,PLP_4sst1dst2asd1dasd2ra_401,PLP_6sst6asd_1942,PLP_7sst8asd_442,PLP_6sst7ssd_1355Following binding acetylcholi