How can i treat nausea from sore throat/post nasal drip?

A simple way to : Reduce nausea ; upset stomach is with ginger. You can drink slightly flattened ginger ale or nibble on crystallized ginger. Or pour boiling water over freshly sliced organic ginger ; steep x 5 min in a covered pot. Sip.For sore throat – gargle with warm salt water (1/2 tsp salt in 8 oz of water). * for congestion – saline nose drops or a netti pot.