In homeopathy, few remedies are as deep-acting and characteristic as Lachesis mutus. Known for its striking mental picture, left-sided affinity, and strong action on the blood and circulation, Lachesis is one of the most frequently indicated remedies in menopausal disorders, hypertension, and septic conditions.
Let’s simplify this powerful remedy into an easy, exam-oriented and clinically useful guide.
Drug Profile of Lachesis Mutus
Common Name: Bushmaster Snake Poison
Family: Ophidia
Source: Venom of the Surukuku snake
Miasm: Psora–Syphilitic
Thermal: Hot patient (cannot tolerate heat)
Sphere of Action (Where Lachesis Works)
Lachesis acts deeply and powerfully on:
- Nervous system
- Circulatory system (blood, vessels)
- Hemorrhagic & septic states
- Female reproductive organs
It mainly affects vasomotor nerves, leading to:
- Congestion
- Bluish discoloration
- Hemorrhages
- Septic conditions
“Sleeps into aggravation”
Patient wakes up worse after sleep (very characteristic)
Keynote of Lachesis
- Cannot bear tight clothes (especially neck & waist)
- Left-sided complaints → go left to right
- Worse after sleep
- Loquacious (talks non-stop, jumps topics)
- Jealous, suspicious personality
- Hemorrhagic tendency (bleeding easily)
- Hot patient
- Discharges relieve complaints
MNEMONIC – “LACHESIS”
Use this MNEMONIC to revise quickly before exams:
L – Loquacious, Left-sided
A – Aversion to tight clothes
C – Cannot bear touch (especially throat)
H – Hot patient
E – Evening/sleep aggravation
S – Symptoms better by discharges
I – Irritable, jealous, suspicious
S – Snake poison (sepsis, hemorrhage)
Mind/Mentals of LACHESIS
- Talks continuously (cannot stop speaking)
- Jealous & suspicious nature
- Religious mania / delusions
- Depression worse on waking
- Mental symptoms appear before physical
Head
- Congestive, throbbing headache
- Pain temple to temple
- Left-sided headache
- Better after discharges (menses, bleeding)
Face
- Bluish, purplish discoloration
- Flushed face
- Left-sided neuralgia
Tongue
- Dry, black, trembling
- Darting in and out
- Difficulty protruding
Throat
- Cannot tolerate touch (even collar)
- Pain starts left → right
- Worse from liquids than solids
Female
Top remedy for MENOPAUSE
- Hot flushes
- Palpitations
- Fainting episodes
- Excessive talking
Other indications:
- Irregular menses
- Left ovarian pain
- Uterine congestion
- Metrorrhagia
Circulations
- Hemorrhagic tendency (bleeding easily)
- Varicose veins
- Thrombosis
- Septic states (bluish wounds)
Respiratory
- Asthma worse after sleep
- Cough by touching throat
- Suffocation sensation during sleep
Skin
- Bluish-purple discoloration
- Small wounds bleed excessively
- Ulcers with dark surroundings
Modalities
Worse From:
- After sleep
- Heat
- Tight clothes
Better From:
- Discharges
- Cold applications
- Open air
Potency & Dose
- Common: 30C – 200C
- Chronic cases: 200C or higher
- Avoid frequent repetition in high potency
Relationship
Complementary: Lycopodium
Follows well: Nux vomica, Sulphur, Mercurius
Antidotes: Arsenicum, Nux vomica
Quick Revision Points of Lachesis
Think of Lachesis as:
- Snake poison remedy
- Hot patient
- Talks non-stop
- Left-sided → right
- Worse after sleep
- Cannot bear tight clothes
- Bleeding tendency
- Best for menopause
Lachesis is a hot, loquacious, left-sided remedy with hemorrhagic tendency, especially useful in menopausal complaints, worse after sleep and tight clothing.