First, read the English article below.

Many anti-nausea medications require a prescription, so a visit to your doctor will be warranted. Describe your symptoms and medical history. He or she may provide you a prescription strength drug or advise you to take an over the counter, non-prescription, drug instead, depending on your particular situation. Take the medications as described on the label or by your healthcare professional. Some people suffer from migraine-induced nausea. If you suffer from this, ask your doctor about metoclopramide (Reglan) or prochlorperazine (Compazine) to help with the symptoms. If you suffer from vertigo and motion sickness, antihistamine meds such as meclizine and dimenhydrinate are helpful.  You can also take anticholinergic drugs such as the scopolamine patch to help with nausea related to these situations.   Be aware that these medications have their own significant side effects and should be used only under strict guidance by a health care professional. Nausea is common in pregnancy and post-surgery. To help with pregnancy nausea, pyridoxine, or vitamin B6, has been shown to be safe and effective in dosages at 50 to 200 mg per day. You can even buy them as lozenges or lollipops. Oral ginger dosed at one gram per day is effective for controlling nausea and vomiting in early pregnancy. Postoperative nausea can be helped with dopamine antagonists (droperidol and promethazine), serotonin antagonists (ondansetron), and dexamethasone (steroids).  Make sure to follow any dosing instructions given by your doctor. The amount you take will depend on your current situation. Stomach flu, also known as gastroenteritis, can be helped by taking bismuth subsalicylate (pepto bismol)or serotonin antagonists (ondansetron). 

Now, please write a short abstract for it in Vietnamese. Abstract:
Đi khám bệnh. Điều trị tình trạng buồn nôn phổ biến. Tìm kiếm sự trợ giúp với tình trạng buồn nôn khi mang thai, sau khi phẫu thuật, và cúm dạ dày.