Muicle
Quick Facts
- What it is: Muicle (Justicia spicigera) is a Mexican and Central American shrub whose leaves make a blue-purple tea used traditionally for tiredness, stomach upsets, period complaints and skin sores.
- Main uses: Tiredness and "weak blood", Diarrhoea and stomach upset, Period pain and irregular periods, Skin sores and rashes, used as a wash
- Best for: People wanting a traditional Mexican herbal tea, with clear eyes about the lack of human evidence
- Active ingredients: Kaempferitrin, Kaempferol and quercetin glycosides, Phenolic acids, Anthocyanin-type blue pigments, Trace alkaloids
- Forms: Dried leaf tea, Fresh leaf infusion, Tincture, Capsules, Skin wash or compress
- Time to effect: Not measured in people; traditional users drink it daily for one to two weeks.
- Side effects: Usually mild: nausea, loose stools, drowsiness or light-headedness; possible low blood sugar if you take diabetes medicine.
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What is Muicle?
Muicle (Justicia spicigera) is a leafy shrub from Mexico and Central America. People steep its leaves and young stems in hot water. The tea turns a striking blue-purple.
It is a single herb, not a blend. People have long drunk it as a general "blood tonic". They also take it for tiredness, upset stomach, painful or irregular periods, and skin sores.
It is also used as a wash on cuts and rashes.
Here is the honest evidence verdict. Muicle has deep standing in home medicine in Mexico and Central America. But almost all the research on it is lab and animal work.
Long use tells you that people valued a plant. It does not prove the plant works. That point is made here once, not in every section below.
How does Muicle work?
No one has shown how muicle works in people. What follows is informed guesswork. It comes from test-tube and rodent studies.
The leaves are rich in flavonoids and pigments. In lab tests, these mop up free radicals (unstable particles that damage cells). Extracts have also slowed the growth of some bacteria and fungi in a dish.
In rodents, extracts have lowered blood sugar. They also changed behaviour in tests used to screen for antidepressant and anti-anxiety effects.
Animal results often fail to repeat in people. Treat these findings as leads, not proof.
What forms does Muicle come in?
Muicle is sold and used in a few simple forms:
- Fresh or dried leaves and stems for a tea (the most common use by far) - Alcohol tinctures and liquid extracts - Capsules of dried powdered leaf - Topical washes, compresses and soaps for skin - Dried leaf as a natural blue dye or food colouring
In Mexican markets you will usually find loose dried leaf. It may be labelled mohuite, mohuitle or añil.
Where it comes from:
Muicle has been used in Mexico since before the Spanish arrived. It shows up in colonial-era herbal records of Nahua medicine. From there it spread through Central America and into Caribbean and Latin American home medicine.
It was mostly given for "weak blood" and tiredness. It was also used for diarrhoea and dysentery (severe diarrhoea with blood), and for period problems. People used it as a wash for wounds and skin problems too.
It is still a staple of Mexican home remedies today.
Who should avoid Muicle?
- Do not use muicle if you are pregnant or think you might be - it is traditionally used to bring on a period, and its effect on pregnancy has never been tested.
- Do not use it if you are breastfeeding, as nothing is known about what passes into breast milk.
- Do not give it to children or babies.
- Do not use it if you take insulin or any other diabetes medicine, unless your doctor has agreed and you are checking your blood sugar.
- Do not use it if you take warfarin, lithium, anti-seizure medicine or anti-rejection medicine after a transplant - the interaction risk is unknown and these medicines have little room for error.
- Do not use it if you have liver or kidney disease, because no one has studied how the body clears it.
- Do not use it in the two weeks before planned surgery, because of the possible blood-sugar effect.
- Do not put it on deep wounds, burns, or skin that is spreading redness, hot or leaking pus - that needs a doctor.
- Do not use it if you have had a reaction to muicle or to other plants in the Acanthaceae family before.
When should you see a doctor?
See a doctor if your tiredness, pale skin or breathlessness continues - these can be signs of anaemia (too few red blood cells) or another condition that needs testing and proper treatment.
Get medical help the same day if you have diarrhoea lasting more than two days, blood in your stool, a fever, or signs of dehydration (dry mouth, little urine, feeling faint).
Stop muicle and seek urgent care if you feel shaky, sweaty or confused, which can mean low blood sugar, or if you develop a rash, swelling of the face or lips, or trouble breathing.
Always tell your doctor or pharmacist you are taking muicle, especially before surgery or if you take regular medicine.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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