The constant feeling of an irritated throat full of mucus can be incredibly frustrating. Many people struggle with this issue without finding lasting relief.

The good news? There are highly effective natural remedies based on medicinal plants with proven decongestant, anti-inflammatory, and expectorant properties.

Below are 9 plants that help clear excess mucus, soothe the throat, and improve breathing. The last one is considered the most powerful of all.

1. Peppermint

Peppermint contains menthol, a compound that acts on respiratory receptors to create a cooling sensation, enhance oxygen flow, and clear the airways.

In addition to its refreshing effect, peppermint has anti-inflammatory and antispasmodic properties. Inhaling its vapor or gargling with warm peppermint tea helps soothe the throat, relax the bronchial passages, and loosen mucus to make it easier to expel.

Tip: Gargle with peppermint tea twice a day for deep, soothing relief.

2. Huaco

Huaco is widely known for its bronchodilator and expectorant effects. It contains coumarin, which helps break down thick mucus and relax the bronchial tubes, making it easier to breathe.

It also acts as a natural antimicrobial, fighting viruses and bacteria that cause congestion. It’s often used as a tea or combined with honey in syrup form.

Caution: Use moderately and under the guidance of a healthcare professional.

3. Chamomile

Beyond its calming effects, chamomile is rich in apigenin, a flavonoid with powerful anti-inflammatory properties. A warm infusion can ease dry cough, reduce inflammation, and help remove mucus.

It also boosts the immune system and can be used for steam inhalation or as a gargle. Ideal in the early stages of a cold or during recovery.

4. Rosemary

Rosemary contains cineole, a potent expectorant that helps eliminate mucus quickly. Its antibacterial properties also fight respiratory infections like bronchitis.

It boosts energy and mental clarity—especially helpful when recovering from illness. It can be used in tea or steam inhalation.

5. Plantain (Yantén)

Plantain is great for soothing an inflamed throat thanks to its mucilage content, which forms a protective coating on the mucous membranes. Its mild expectorant and pain-relieving effects calm coughs and break down mucus.

Daily use helps protect the throat and prevent future congestion. It’s especially effective when combined with chamomile or huaco.

6. Licorice

Known for its naturally sweet taste, licorice is one of the most effective remedies for soothing irritated mucous membranes. It contains glycyrrhizin, which helps thin mucus and ease its removal.

Licorice also relaxes the bronchi and strengthens the immune system. It’s best consumed as a warm tea before bed. Note: Use in moderation—excessive intake can cause side effects.

7. Thyme

Thyme is packed with antiseptic, anti-inflammatory, and expectorant properties. Its main compound, thymol, combats bacteria and fungi while reducing inflammation.

It’s highly effective against colds, sinus infections, and persistent cough. Enjoy it as a tea with honey and lemon, or use it in steam inhalation.

8. Mallow

Thanks to its high mucilage content, mallow creates a soothing protective layer on the throat lining. It hydrates, reduces pain, minimizes mucus, and speeds up recovery after a cold or flu.

Suitable for all ages, mallow can be used as an infusion or gargle. It also helps prevent future throat irritation.

9. Eucalyptus – The Most Powerful

Eucalyptus is considered the most effective plant for quickly clearing mucus and phlegm. Its main compound, cineole (also known as eucalyptol), has strong decongestant, expectorant, anti-inflammatory, and antiseptic actions.

Inhaling eucalyptus vapor loosens mucus, clears the respiratory tract, and soothes irritation. It can also be used in diffusers or as an herbal tea. Properly diluted eucalyptus essential oil is perfect for steam baths or massages.

Warning: Never ingest undiluted essential oil. For children or older adults, it’s safer to use dried leaves.

These plants offer a natural, affordable, and effective alternative to ease mucus build-up, soothe the throat, and improve breathing. Combining several of them can boost their benefits—just remember to use them with care and in moderation.