For acute sinusitis you need not to worry much. What you have to do is take some antibiotic such as Cap Amoxycillin three times daily or Tab Augmentin three times daily after meals with Some anti-cold remedies such as Tab Wikoryl or Tab Diominic-dca three times daily after meals with Tab Rantac or Famotid two times daily before meals. If running nose is very severe than you can use Otrivin or Nasoclear nasal drops. Another thing what you have to do is to take steam inhalation at least three to four times daily. It is very important in case of acute sinusitis. You have to be careful enough because if you are not following the instructions properly it will progress to chronic sinusitis which is somewhat more troublesome and irritative.