High blood pressure suddenly dropped to 100/70mmHg, if there is no discomfort symptoms, you can continue to take medication, but pay attention to monitoring blood pressure, if the blood pressure continues to fall, to seek medical attention, if the blood pressure falls at the same time accompanied by obvious dizziness and panic symptoms, to stop taking medication as soon as possible to seek medical attention. Blood pressure 100/70mmHg is normal, if there is no dizziness, chest tightness, panic and other symptoms, you can first observe. If the usual blood pressure has been at a higher level, suddenly lowered to 100/70mmHg, also accompanied by dizziness and panic and other symptoms of low blood pressure. This situation may be the aggravation of the primary disease or the emergence of other diseases, such as heart failure, decreased blood volume, serious infections. It is recommended to stop the medication and go to the hospital to clarify the cause and actively treat it if necessary.