dicloxacillin can not be used in liq form wheather cloxacillin can be.

Sinus infection is due to viral, bacterial or fungal infection. Dicloxacillin can very much be prescribed to treat a sinus infection caused by staphylococcus bacteria.

it releases aids into your blood stream if you take it too much

You should be fine consuming alcohol with Dicloxacillin, yes. Most antibiotics don't interact negatively with alcohol (though a few do).

http://www.steadyhealth.com/articles/Antibiotics___Alcohol__The_truth_and_myths_a144_f74.html

There are several ways that heavy growth of staphylococcus aureus can be treated. Some medicines used are methicillin, nafcillin, oxacillin, cloxacillin, dicloxacillin, and flucloxacillin.