You can use olive oil, grapeseed oil, avocado oil, or almond oil.

You can also place the oregano in a plastic bag and smash it with a mallet or rolling pin. [2] X Research source If you have a mortar or something similar, you can crush the oregano that way, too.

Warming the oil helps the oregano and oil infuse better. Alternately, you can place the jar in hot water after you place the oregano inside and seal the jar to infuse it. If you do this, leave the jar in the hot water for up to 10 minutes. [4] X Research source

Place the lid on the jar when the oregano is added.

Make sure to shake the jar every few days. Some people think letting it infuse longer is better for medicinal use. If you want to let it infuse longer, keep it infused for up to six weeks, but no longer. It could go bad.

Place the oil in a sanitized jar or a dropper bottle. Store it in a cool, dark place. You can also store it in the refrigerator.

Garlic, honey, and oregano are antimicrobials that help naturally fight colds and coughs. You can also add ½ cup of onion and one lemon if you want.

Store in your refrigerator for a week. This makes an even stronger cough syrup because the garlic and onion (if you add onion) are stronger and have more medicinal properties if they aren’t cooked.

Don’t give the cough syrup to children under a year old because of the honey.

Another way to use oregano oil for coughs is to take three to five drops daily when you have a cough. You can put the oil in water, tea, orange juice, or directly into your mouth. [7] X Research source [8] X Research source

Oregano is believed to fight coughs, colds, congestion, sinusitis, allergies, arthritis, sore muscles, tooth aches, burns, ear infections, insect bites, and digestive issues like diarrhea. [11] X Research source