Is there an immediate cure for a running nose?

Salt Water

Salt water is the best home remedy for alleviating the irritation that accompanies a runny nose. Salt water will help thin the mucus, making it easier and more comfortable to expel. It will also help clear the nasal passages of irritants.

Mix one-half teaspoon of table salt in two cups of distilled warm water.
Using a dropper, put a few drops of the solution into each nostril with your head tilted back.
Inhale very gently to draw the solution further into your nasal passages. Then blow your nose to remove excess mucus and solution.
Do this a few times at a sitting until you feel relief.
Repeat a couple of times each day until your condition improves.

Steam

Steam is also an effective home remedy for a runny nose. It helps clear out excess mucus that causes a runny nose and sneezing.

Hold your face over a bowl of hot water, with a towel over your head to trap the steam. Breathe in the steam for about 10 minutes, and then blow your nose. Do this three or four times a day.
You can also add a few drops of eucalyptus oil or menthol to the hot water before breathing in the steam.
Alternatively, you can take a hot shower or bath.

Turmeric

Turmeric works as an antidote for many health conditions, including a runny nose. The herb has strong antioxidant, anti-inflammatory, antibacterial and antiviral properties that make it very effective for treating a runny nose as well as a cold.

Soak one-half teaspoon of dry, ground turmeric in a cup of linseed oil. Hold the mixture over heat until it starts smoking. Slowly inhale the smoke through one nostril and then the other. Do this twice daily.
One-half teaspoon of turmeric powder can also be taken two times a day. You can take it with some water. This will help loosen the mucus in the body.
Mix one teaspoon of turmeric powder in a glass of warm milk and drink it before going to bed. This will offer quick relief from a runny nose, cough, cold, sore throat and also asthma. You can add a pinch of black pepper as well.