There is very little health value in alcohol in general, but it can be especially bad for people with high blood pressure. First, alcohol may be high in sugar itself or mixed with sugary beverages.
Second, drinking too much causes dehydration and is linked to weight gain, both of which are risk factors for hypertension. And finally, drinking more than three alcoholic beverages in a sitting will spike your blood pressure on the spot.
You probably don’t need to avoid alcohol entirely, but try to choose lower sugar options and stick with just one a day.