Hello, Welcome to HCM, I had reviewed your history and understand your concern, As you are having symptoms of vertigo and taking some medicine. Some types of vertigo will disappear without treatment. I would advise some of the remedies which you can do it in the home 1.As soon as the symptoms begin take a bit of salt, black pepper and lemon juice in a glass of warm water and drink to prevent a bout of vertigo. 2.Avoid sudden jerks and movements that lead to imbalance while getting up from the bed. 3.High intake of liquids such as juices and water keeps your body hydrated 4.Have a healthy diet that contains vitamins and minerals. 5.Try to to relax your body and make sure you have enough sleep because lack of sleep can aggravate vertigo and cause sudden dizziness. When taken together Histamine and Metoprolol medicines may cause some risk.The amount of metoprolol in your blood may increase and cause more side effects than normal. So you can follow the above remedies, if the symptoms are not coming down for medications you need to consult your doctor and inform him that you are on Metoprolol medicine. Hope you got the clarification for the query. Thank you.