Antihistamine
If allergies are the cause of your nasal congestion and sinus pressure, managing it will reduce your symptoms. You can use allergy drugs that have an antihistamine to reduce the sniffling and sneezing along with a decongestant to reduce the congestion and sinus pressure.
In some cases, you may see antihistamine in some multi-symptom cold medicines which can help a runny nose [3] and sneezing [4]. They are mostly seen in nigh time cold drugs, because they can make you sleep. It is important to read and follow the instructions and talk to your doctor if you have any questions.