Betalock drug name is metoprolol tartrate, nausea and vomiting after taking, may be adverse drug reactions, heart failure, gastrointestinal diseases caused by, should be based on different causes of treatment, such as adjusting the time of taking medication, correcting heart failure, protection of the gastrointestinal mucosa and other treatments, to be specific, specific analysis, can not be generalized. 1. Adverse drug reactions: some patients may be due to personal physical reasons, resulting in metoprolol drug intolerance, nausea, vomiting, at this time you can adjust the time of the drug, such as changing the oral after meals, while avoiding stimulating food, quit smoking, alcohol and so on. 2. Heart failure: if caused by heart failure, it is necessary to follow the medical advice to correct heart failure treatment, such as furosemide, spironolactone diuretic to reduce gastrointestinal stasis, etc., if necessary, need to be hospitalized. 3. Gastrointestinal diseases: some patients may take metoprolol after the gastrointestinal disease recurrence or aggravation, can follow the doctor’s instructions oral drugs, such as omeprazole, rabeprazole, such as gastric disease is more serious, it may need to pause to take the drug, change to intravenous drip drugs such as esmolol alternative treatment. If the patient recurrent nausea, vomiting, it is recommended to timely visit the hospital, after clarifying the cause of the disease, targeted treatment.