Eucalyptus

A tall Australasian Myrtaceae, Eucalyptus globulus concentrates a powerful essential oil (cineole/eucalyptol) with tannins and resin. In 19th-century pharmacy the oil and leaf were renowned antiseptics, deodorants, expectorants, and “antiperiodics,” planted to drain marshes and reputed to alter malarial terrains [Hughes], [Clarke]. Toxicology describes gastric burning, nausea, vomiting, diarrhœa, prostration, cyanosis, respiratory depression, renal irritation (albuminuria/oliguria), and vertigo; the breath and secretions may carry the characteristic odour of the oil [Allen], [Hughes], [Clarke]. Homœopathic tincture (φ) from the fresh leaf is triturated and potentised. Clinical tradition in homœopathy places Eucalyptus in septic or catarrhal states with foul secretions, bronchitis/bronchiectasis, influenza, intermittent fevers with splenic congestion, and sluggish wounds or ulcers with fetor—aligning with the drug’s antiseptic and antiperiodic reputation [Clarke], [Boericke], [Hale], [Dewey].

No Hahnemannian proving of large scope; the pathogenesis rests on Allen’s collation of provings/poisonings and abundant 19th–20th century clinical confirmations in catarrh, influenza, intermittent fevers, septic states and sluggish wounds [Allen], [Hering], [Clarke], [Boericke], [Hale], [Hughes]. Tags appear as [Proving], [Toxicology], or [Clinical].

Eucalyptus is the antiseptic catarrh remedy with a marsh-weather accent. The whole picture smells of stagnation: rooms too hot and still, weather too damp and foggy, secretions thick and fetid. Open the window—literally and therapeutically—and the patient brightens: the head clears, the cough loosens, the chest lightens. Drainage is the law: better after free nasal discharge, better after copious expectoration, better after a good sweat. The mucosae—nose, throat, bronchi—bear the brunt: loose, heavy catarrh with an offensive odour; voice rough; throat raw but soothed by warmth and steam; cough productive, especially at night, yet relieved when the spittoon fills. The environmental polarity is decisive: worse in damp, foggy, marshy localities; worse in hot, close rooms; better in fresh, dry moving air—the keynote that recurs across Mind (seeks a window), Head (frontal relief after discharge), Nose/Throat (drainage + warmth), Chest/Respiration (easier propped by the sash), Sleep (rest only after sweat).

A second axis is periodicity: in marsh seasons a malarial rhythm appears—splenic heaviness, evening chill, head heat, then sweat with relief. Here Eucalyptus fits where the intermittent picture is meteorologic (fog/low-lying damp) and catarrhal, not the punctilious clock of Cedron nor the profound post-sweat collapse of China. Post-malarial languor responds when foul catarrh and the ventilation/relief hinges are present. A third axis is fetor/sepsis: mouths, throats, sputum, even wounds seem “ill-smelling”; Eucalyptus belongs before the raw granulation stage (Calendula), clearing the toxic atmosphere (compare Echinacea where dusky glands and septic tissue dominate, or Baptisia with besotted typhoid mind).

Pathophysiologically, think cineole’s tropism for mucosae and the vascular bed: increased secretion, antiseptic odour, expectorant loosening coupled to portal–splenic congestion in marsh-triggered intermittents. Hence the practical pivots: ventilation, warmth locally to airways, dry climate if possible, light diet. Prescribing pointers: if the case repeats “I feel oppressed in this room; I must open the window,” and improvement follows expectoration/sweat, and the foulness of breath/sputum is remarked—Eucalyptus merits front-rank consideration. If instead secretions are tough, stringy plugs (Kali bich.), or green–sweetish with chest emptiness (Stann.), or if there’s rattling with inability to raise (Ant-t.), adjust accordingly. In influenza, Eucalyptus often follows Gelsemium and Bryonia as the case turns “wet and foul.” In wounds it buys time and cleanliness before remedies of repair. The overall pace is subacute-chronic—a dragging catarrh that lifts when the window, kettle, and remedy are used together.

• Respiratory mucosa (nose–throat–bronchi) — profuse, often fetid catarrh; loose cough with thick, copious expectoration; relief from warm inhalations/freer drainage; see Nose/Throat/Chest [Clarke], [Boericke].
• Lungs (bronchitis/bronchiectasis) — copious, offensive sputum; asthenia; night sweats; see Chest/Respiration [Clarke], [Dewey].
• Blood–septic terrain — foul discharges, low fevers with malaise and odour; general “antiseptic” reputation; see Fever/Generalities [Hughes], [Hale], [Clarke].
• Periodic (malarial) fevers & spleen — marsh/damp aggravations; splenic tenderness or enlargement; post-malarial languor; see Abdomen/Fever [Clarke], [Boericke], [Hughes].
• Mouth & fauces — fetid breath, thick ropy mucus, ulcerated patches; see Mouth/Throat [Clarke], [Allen].
• Portal–hepatic drainage — biliousness, bitter taste, coated tongue; dysenteric tendencies; see Stomach/Abdomen/Rectum [Hughes], [Allen].
• Genito-urinary catarrh — irritating urine, cloudy with mucus; mild burning; septic odours; see Urinary [Clarke], [Boericke].
• Skin & wounds — sluggish, fetid ulcers or suppurations; deodorant action; see Skin [Clarke], [Hale].

A toxic languor with dullness of thought marks influenza and septic colds; the patient craves moving air and resents close, hot rooms—this tallies with the amelioration from ventilation already noted [Clarke], [Dewey]. Irritability grows as catarrh thickens; he prefers to be left quiet, answering shortly, and avoids effort or conversation that provokes cough (Respiration echo) [Boericke]. Anxiety relates to breathing at night and to the foulness of secretions; attendants remark the characteristic odour—sometimes even “eucalyptus” on the breath in crude drugging—which abashes the patient (Mouth/Generalities) [Clarke], [Hughes]. Mental heaviness alternates with brief bursts of restlessness in fever, yet there is little of Baptisia’s besotted confusion; rather a tired clarity that brightens after a good expectoration or sweat (Head/Chest/Fever echoes) [Dewey], [Clarke]. Oversensitivity to damp and fog enters the psychology as a weather-watching habit; impending fog foretells relapse in marsh dwellers (Fever/Generalities) [Hughes], [Clarke]. Children are peevish and whiny in catarrh, demanding warm drinks and an open window (Throat/Nose) [Boericke]. Memory is sluggish during prolonged foul catarrh; composure returns as secretions clean (Mouth/Throat link) [Clarke]. Unlike Arsenicum the anxiety is not burning fear of death but weary apprehension of the next coughing fit or chill, better in the fresh air that Eucalyptus craves [Farrington], [Clarke]. Mini-case: “Bronchiectatic old man, fetid sputum, worse damp nights; sat by the open sash; after Eucalyptus 3x and steam inhalations, expectoration freer, temper improved” [Clinical], [Clarke].

Drowsy by day, wakeful at night with cough and heat; falls asleep after a profuse sweat or expectoration—an explicit echo of the “drainage” hinges (Chest/Fever) [Clarke], [Boericke]. Sleep disturbed in close rooms, better with window open (Mind/Modalities). Children toss and throw covers off when room is hot, then settle when air moves [Clarke]. Dreams of suffocation or of wandering in fog have been noted clinically (Respiration link) [Clinical].

Anxious dreams of falling into water or moving through mist; wake to cough (Fever/Respiration link) [Clinical]. Dreams forgotten on waking exhausted; clearer sleep follows a free sweat (Sleep echo) [Boericke]. No pathognomonic themes in provings.

Eucalyptus centres on foul, heavy catarrh and septic odours with a marked craving for moving, dry air and for drainage—free nasal flow, free expectoration, free sweat—each bringing relief; it dislikes close, hot rooms and damp, foggy weather that rekindle oppression, periodic chills, and congestive head pressure [Clarke], [Boericke], [Hughes]. The bronchial tree is laden; breath is offensive; cough is loose and better after much expulsion; nights bring sweat and weakness, yet the sufferer brightens at an open window (Nose/Chest/Sleep echoes) [Clarke], [Dewey]. In marsh districts and damp seasons a malarial periodicity appears: splenic heaviness, evening chills, morning catarrh; Eucalyptus suits when this periodicity travels with the antiseptic theme of fetor and copious secretions (China/Cedron contrasts) [Hughes], [Clarke]. Gastric and portal dyspepsia, bitter taste, and fetid stools colour the picture; urinary catarrh echoes the mucous tendency. Differentials pivot on the quality of secretions and modalities: vs. Kali bich. (thick, stringy plugs; stitching pains); vs. Stannum (greenish, sweetish sputum with great weakness in chest); vs. Kali sulph. (yellow, slimy, worse warm rooms, better cool fresh air—often complementary); vs. Antimonium tart. (rattling with poor expulsive power, drowsy, cyanotic); vs. Baptisia/Pyrogenium (septic fevers with profound stupor or pulse-temperature discordance) [Farrington], [Boger], [Dewey]. The practitioner should listen for the triad: fetor + copious, loose catarrh + damp/fog aggravation; and for the hinges: relief by ventilation, expectoration, perspiration.

Intermittent, “malarial” fevers with damp-weather periodicity; chill in late afternoon or evening with yawning and limb aches; hot stage with head heat, frontal pressure; then profuse sweat with relief—compare China when sweat is non-relieving and debility extreme; Eucalyptus when catarrh/fetor and marsh modalities lead [Clarke], [Hughes], [Boericke]. Influenza with low vitality, copious secretions, and night sweats belongs here [Dewey]. Temperature may be moderate; the patient feels more oppressed than burning [Clarke].

Chill: from damp/fog; wraps up yet wants air to head (Head echo) [Clarke]. Heat: head/face hot, extremities heavy; aversion to close rooms (Mind link) [Boericke]. Sweat: profuse, sometimes offensive, especially at night; follows relief of cough; patient feels lighter after (Fever/Chest echoes) [Boericke], [Clarke].

Frontal, dull, pressive headache with stuffed nose; worse in warm, close rooms; better in open air and after free nasal flow—an explicit echo of the ventilation and drainage modalities [Clarke]. Vertex heat with general chilliness occurs during the “hot stage” of influenza; sweat relieves and clears the head (Fever link) [Boericke]. Dizziness with faint nausea in rooms heavy with odours; steadies near the window (Mind echo) [Clarke]. Splenic or hepatic congestions throw heaviness to the head with bilious taste—gastric–portal reflex (Stomach/Abdomen) [Hughes]. Periodic malarial headaches precede chill, especially in damp weather; China is compared when thirst and debility are paramount; Eucalyptus suits with catarrh and odour [Clarke], [Hughes]. Children complain of head heaviness with coryza; they brighten after a warm drink and free sneeze (Nose echo) [Boericke].

Smarting, watering eyes with photophobia in fog; conjunctivæ suffused in influenza; relief in moving air and darkness (Nose/Head cross-link) [Clarke]. Lids feel heavy; astringent washes palliated conventionally, but the remedy picture is systemic catarrh [Hughes]. Vision “swims” on rising during fevers; steadies after expectoration (Fever/Chest echo) [Dewey]. Lachrymation not acrid as in Allium cepa; discharge more bland though the nose may be fetid [Clarke], [Farrington]. Eyes feel strained by indoor fumes; open air is better (Generalities). No specific retinal signs reported in the classical sources.

Dull earache with Eustachian catarrh; deafness “as through cotton” in colds; worse in damp fog, better dry air (Nose/Throat echoes) [Clarke]. Roaring or humming during fevers with head heat; subsides after perspiration (Fever link) [Boericke]. Stitching pains are less prominent than in Hepar/Kali bich.; the tone is congestive–catarrhal [Farrington].

Extensive sphere. Coryza at first watery, then thick, yellowish, foul; nose obstructed at night; better after free discharge and in open, dry air—these repeat the remedy’s drainage and ventilation motifs [Clarke], [Boericke]. Frontal pressure and dullness attend; suppression of coryza by draughts or drugs drives symptoms inward to chest or head (Head/Chest cross-link) [Clarke]. Fetid odour offends others and embarrasses patient; steam or warm drinks loosen the crusts (Throat echo) [Hale]. Sneezing in morning in damp weather; nasal voice; dryness alternating with flow as rooms heat/cool (Generalities) [Clarke]. In long catarrhs, crusts form with post-nasal drip; Eucalyptus suits the foul, heavy variant rather than the stringy plugs of Kali bich. [Farrington].

Face flushed in hot stage, pallid in chill; expression weary but relieved when window is opened (Fever/Mind echo) [Clarke]. Lips dry with bitter taste on waking (Mouth link) [Hughes]. Infra-orbital soreness from sinus pressure in damp weather (Head/Nose) [Clarke]. No neuralgic signature; if face-pain is dominant think of Spigelia or Silicea.

Tongue coated whitish or yellow with imprint of teeth in catarrh; taste bitter, mawkish, or tainted; breath offensive—occasionally with the peculiar aromatic taint of eucalyptus itself in crude-drug states [Allen], [Clarke], [Hughes]. Aphthous patches or superficial ulceration in septic mouths; washings palliated locally; constitutional concordance gives more lasting relief [Clarke]. Saliva thick, ropy; mouth feels hot and dry though thirst is moderate (Stomach link) [Hughes]. Warm drinks soothe; cold draughts chill and suppress (Food & Drink echo) [Boericke].

No characteristic odontalgia. Sensation of elongation and dull ache with sinus pressure in damp weather is occasional (Nose/Head link) [Clarke]. Bleeding gums when brushing in septic mouths are adjunctive, not guiding; compare Merc. [Farrington].

Rawness and burning with constant desire to clear thick mucus; voice hoarse; worse on entering a cold draught, better from warm drinks or steam (modal echo) [Clarke], [Boericke]. Tonsils congested with foul exhalation, less ulcerative than Merc.; sticky tenacious mucus easier after warmth (Kali bich. contrast) [Farrington]. Sensation of a film or coating; hawking brings relief (Generalities) [Clarke]. Swallowing causes scraping but little knife-like pain; if painful swallowing predominates look to Hepar or Phos. [Kent].

Chief sphere with the nose and throat. Loose, rattling cough with copious, often fetid expectoration; better after expelling quantities of thick mucus; worse night and damp fog; better warm inhalations and open air—these are the leitmotifs [Clarke], [Boericke]. Oppression on lying flat; wants to be propped; breathes easier near a window (Respiration/Modalities echo) [Clarke]. Bronchiectatic cases with heavy, foul sputum and night sweats belong to Eucalyptus when the foulness–damp modality predominates (compare Stann., Kali-s., Ant-t.) [Dewey], [Farrington]. Stitching pleurisy is not key; if sharp stitches predominates, think Bryonia [Boger].

Pulse soft, compressible during fever; palpitations with dyspnœa on exertion; steadier in cool air (Generalities echo) [Dewey]. Depression of the circulation noted in toxicology (cyanosis, collapse) warns against crude oil misuse [Allen], [Hughes]. No structural valvular signature in the homœopathic picture.

Dyspnoea worse in damp and close rooms; better in dry, moving air; must clear mucus to breathe easily (Chest cross-link) [Clarke], [Boericke]. Paroxysms excited by sudden cold draught across chest/throat (Throat echo). Asthmatic constriction abates when expectoration becomes free (Better after expectoration) [Clarke].

Loss of appetite with bitter taste; nausea in close rooms; warm fluids gratefully taken (Mind/Modalities echo) [Hughes], [Clarke]. Epigastric burning after draughts of cold air/liquids (Toxicology note) [Allen]. Belching offensive; sense of weight after rich food; diarrhœa may follow fatty meals (Food & Drink) [Hughes]. In influenza the stomach seems secondarily oppressed; improvement follows perspiration or free expectoration (Fever/Chest link) [Dewey].

Splenic region tender or heavy in marsh dwellers; intermittent fevers leave the left hypochondrium full—Eucalyptus has been clinically lauded where catarrh and damp-weather periodicity accompany this state [Clarke], [Hughes], [Boericke]. Hepatic dullness with bilious eructations; tongue coated; stool offensive (Stomach/Rectum link) [Hughes]. Flatulence with rumbling under the right ribs; better after eructations (Food link) [Clarke]. Colicky pains occur with dysenteric stools in septic summers; less tenesmus than Merc. cor. but more fetor (Rectum) [Dewey].

Stools loose, offensive, brownish; sometimes dysenteric with mucus and streaks of blood in septic heats—relieved when air is cool and diet light (Generalities/Food echo) [Hughes], [Dewey]. Tenesmus is moderate; if incessant with scalding, Merc. cor. outranks Eucalyptus [Farrington]. Hæmorrhoids sore, bleeding bright after straining; odour is fetid rather than merely venous (Echinacea/Hamamelis differential) [Clarke].

Urine cloudy with mucus in catarrhal cystitis; odour heavy; slight burning at the beginning; urging after chill; better as the general catarrh improves [Clarke], [Boericke]. Darker urine during fevers; in toxic doses albuminuria/oliguria may appear [Toxicology] [Allen], [Hughes]. Enuresis is not characteristic; if present with dreams consider Equisetum [Hering].

Aversion to fats and rich foods; bitter taste; desire for warm drinks which soothe and loosen phlegm (Throat/Stomach echoes) [Hughes], [Clarke]. Cold draughts/liquids chill and suppress (Modalities). Alcohol aggravates catarrh (Generalities) [Hughes].

No primary sexual keynote. Heat of urethra and scanty, cloudy urine reflect the catarrhal base (Urinary link) [Clarke]. Low desire in influenza; returns as strength and breath improve [Dewey]. Prostatic congestion is not typical; if dominant, look to Sabal/Chimaphila.

Leucorrhœa fetid, thick, with rawness of vagina/cervix; better local warmth; accompanies general catarrh (Skin/Mucosa echo) [Clarke]. Menses delayed/scant during fevers; flow resumes as vitality returns [Boericke]. Puerperal septic odours have been managed palliatively in the Eucalyptus constitution (Clinical) [Hale], [Clarke]. If hæmorrhage is bright and motion-provoked, see Erigeron; if venous, Hamamelis.

Dorsal ache between Scapula from coughing; tired lumbar spine after sweats; heat eases (Fever echo) [Boericke]. Splenic “drag” noted (Abdomen link) [Clarke].

Aching limbs with intermittent fevers; worse in damp weather; better in dry warmth (Fever/Generalities) [Clarke], [Hughes]. Weariness with influenza and night sweats (Fever link) [Boericke]. No characteristic joint swelling.

Unhealthy, fetid ulcers and sluggish granulations; Eucalyptus aids when the local odour and sepsis dominate (compare Calendula for pure granulation) [Clarke], [Hale]. Night sweats with offensive odour in bronchial subjects (Fever link) [Boericke]. Eruptions are not defining.

Influenza / Catarrhal Fevers

• Gelsemium — dull, droopy, trembling, little catarrh; Eucalyptus has heavier, fetid secretions, relief by ventilation and sweat [Dewey], [Clarke].
• Bryonia — dry, painful cough, stitching chest, great thirst, worse least motion; Eucalyptus is looser, fouler, better after expectoration [Boger], [Farrington].
• Eupatorium perf. — intense bone-aches, scant catarrh; Eucalyptus: catarrh and fetor lead [Dewey].

Bronchitis / Bronchiectasis

• Stannum — copious, greenish, sweetish sputum with marked chest weakness and empty feeling; Eucalyptus: fetid, offensive sputum, damp aggravation, better ventilation [Farrington].
• Kali bichromicum — tough, stringy plugs, pain at one spot; Eucalyptus has looser, foul mucus, better warmth/steam [Farrington].
• Antimonium tart. — rattling with poor power to raise; drowsy, cyanotic; Eucalyptus raises freely and is better after expectoration [Boericke].
• Kali sulphuricum — yellow, slimy sputum, worse warm rooms, better cool air; very close and often complementary [Boger], [Boericke].

Septic States / Fetor

• Baptisia — typhoid stupor, besotted mind; Eucalyptus: dull but clear, odour/fetor with catarrh [Dewey].
• Echinacea — foul discharges with dusky margins and tender nodes; Eucalyptus more mucosal, less glandular [Clarke], [Boericke].
• Pyrogenium — pulse–temperature discordance; Eucalyptus lacks paradox, focuses on mucosae [Dewey].

Intermittent (Malarial) Fevers

• China — periodicity with profound debility, bloating; Eucalyptus when damp/fog triggers, splenic heaviness plus catarrh [Hughes], [Clarke].
• Cedron — clock-like periodicity, neuralgias; Eucalyptus periodicity more meteorologic [Farrington].
• Natrum muriaticum — chronic post-malarial anaemia, headaches 10–11 a.m.; Eucalyptus has more fetid catarrh [Clarke].

Throat / Nose

• Allium cepa — acrid nasal, bland lachrymation, better open air but worse warm rooms; Eucalyptus has fetor, thicker mucus, relief by warmth/steam [Farrington].
• Hepar sulph. — raw, painful throat, stitching; Eucalyptus: scraping with copious foul mucus, better warmth but less stabbing pain [Kent].

Gastric / Enteric

• Arsenicum — burning pains, anxiety, restlessness; Eucalyptus is more foul-catarrhal, less anxious [Farrington].
• Mercurius — salivation, ulceration, offensive breath with nightly aggravation; Eucalyptus lacks the constant sweat–saliva complex [Kent], [Clarke].

• Complementary: Kali sulph. — both crave fresh air; Kali-s. for yellow slimy mucus; Eucalyptus where fetor and septic odour dominate [Boericke], [Boger].
• Complementary: China — post-malarial weakness after Eucalyptus quiets damp-triggered periodicity [Hughes], [Dewey].
• Complementary: Calendula — for clean granulation after Eucalyptus has corrected foulness in wounds [Clarke], [Hale].
• Follows well: Gelsemium — after the initial fluey stupor lifts but foul catarrh remains [Dewey].
• Follows well: Bryonia — after the dry, stitching phase yields to loose fetid expectoration [Boger].
• Precedes well: Stannum — when weakness in chest remains after fetor declines [Farrington].
• Precedes well: Kali bich. — if tough plugs persist in sinuses post-catarrh [Farrington].
• Related/Compare: Baptisia, Echinacea, Pyrogen., Ant-t., Stann., Kali-s., Kali-bich., Allium cepa, Bry., Gels., China, Cedron (see Differentials).
• Antidotes: Nux/Camphor for over-action or crude oil effects (gastric/cardiac depression) [Allen], [Hughes], [Kent].
• Inimicals: none specific recorded; avoid needless alternation among close catarrhal congeners [Kent], [Boger].

Typical indications: Foul, copious catarrh (nose→bronchi) with relief from warm inhalations, open air, and free expectoration; bronchitis/bronchiectasis with offensive sputum and night sweats; influenza turning “wet” with frontal pressure and fetid breath; intermittent fevers in damp/fog with splenic heaviness; septic, ill-smelling wounds/ulcers needing constitutional “airing” [Clarke], [Boericke], [Hughes], [Dewey], [Hale]. Potency: φ–3x/6x were used classically for topical/inhalant adjuncts and low-grade catarrh; 6C–30C for systemic catarrh/influenza; 200C when keynotes are crystalline (fetor + ventilation craving + drainage relief); LM/Q for chronic bronchiectasis or marsh periodicity [Dewey], [Vithoulkas], [Boericke]. Repetition: in acute catarrh, repeat per return of oppression (often q4–8h), then space as drainage and air hunger lessen; in chronic bronchiectasis, daily LM/Q or weekly centesimals with close watch on sputum burden and night sweats [Dewey]. Adjuncts mirroring modalities: ventilate rooms; avoid damp exposure; use warm steam (plain) to assist expectoration; light, warm broths; avoid oils/fats and alcohol during catarrh; convalescent walks in dry air; in intermittent fevers, keep out of marsh fogs when possible [Clarke], [Hughes].
Case pearls:
• Bronchiectasis with fetid, copious sputum, night sweats; better by an open window—Eucalypt. 30C b.i.d. + simple steam loosened sputum; later Stann. for residual chest weakness [Clarke], [Dewey].
• Marsh intermittent with splenic drag, coryza, evening chill, sweat-relief; Eucalypt. 6C t.i.d., dry-air regimen; fewer attacks over a wet fortnight [Hughes].
• Influenza turned wet and foul after a dry Bryonia phase; Eucalypt. 200C single dose; next day freer expectoration and good sweat with head clear [Boericke], [Clinical].

Mind

• Desire for open air; aversion to close, hot rooms — ventilation keynote; predicts relief by window [Clarke].
• Irritable from foul catarrh; prefers silence and rest — catarrhal temperament [Boericke].
• Anxiety about breathing at night; better when expectoration is free — hinge rubric [Dewey].
• Weather-watching; anticipates fog with relapse — meteorologic periodicity [Hughes].
• Concentration difficult in rooms filled with odours — fetor sensitivity [Clarke].
• Better after perspiration/expectoration — drainage hinge [Clarke], [Boericke].

Head

• Headache, frontal, dull, with coryza; better in open air and after nasal discharge — classic drainage relief [Clarke].
• Vertex heat with general chilliness in influenza — biphasic fever sign [Boericke].
• Headache, malarial, worse damp weather — marsh periodicity [Hughes].
• Dizziness with nausea in hot rooms; better at window — environment polarity [Clarke].
• Sinus pressure with fog; infra-orbital soreness — damp aggravation [Clarke].
• Headache relieved by perspiration — fever hinge [Boericke].

Nose/Throat

• Coryza, profuse, fetid; obstruction at night — catarrhal sphere [Clarke].
• Post-nasal drip, thick, offensive; better warm drinks/steam — management cue [Hale].
• Fetor, breath/nasal — antiseptic indication [Clarke].
• Rawness in fauces with thick ropy mucus — throat catarrh [Boericke].
• Hoarseness from cold draught; better warmth — modality [Clarke].
• Coryza suppressed → chest tightness — “driven in” warning [Clarke].

Chest/Respiration

• Cough, loose, with copious, offensive expectoration; better after expectorating — master chest rubric [Clarke], [Boericke].
• Bronchitis/bronchiectasis with fetor and night sweats — chronic sphere [Dewey].
• Dyspnoea worse damp/fog; better dry, moving air — environment hallmark [Clarke].
• Must be propped up; lying flat aggravates — positional rubric [Boericke].
• Sudden cold air to chest excites cough — trigger [Clarke].
• Oppression relieved by warm inhalations — practical note [Hale].

Fever/Generalities

• Intermittent fever, damp-weather periodicity; splenic heaviness — malaria-adjacent [Hughes], [Clarke].
• Sweat profuse with relief; offensive in bronchial subjects — drainage + fetor [Boericke].
• Worse in hot, close rooms; better in open air — environment [Clarke].
• Septic odours/ill-smelling secretions — antiseptic signature [Clarke], [Hale].
• Weakness after sweats but mind clearer — fever arc [Dewey].
• Damp weather aggravates all symptoms — meteorologic rubric [Hughes].

Stomach/Abdomen/Rectum

• Bitter taste; coated tongue with catarrh — portal link [Hughes].
• Nausea in close rooms; better warm drinks — environment + warmth [Clarke].
• Splenic enlargement/tenderness in marsh dwellers — lateralising aid [Clarke], [Hughes].
• Diarrhoea dysentery, offensive; summer/septic — enteric sphere [Dewey].
• Stool offensive; relief after diet and air — practical [Hughes].
• Hæmorrhoids sore with fetor — confirmatory [Clarke].

Urinary/Skin

• Urine cloudy with mucus; catarrhal cystitis — mucosal echo [Clarke].
• Burning at beginning of micturition, mild — differentiation from Canth. [Farrington].
• Albuminuria in drug effects — toxicology warning [Allen], [Hughes].
• Ulcers, fetid, sluggish granulation — antiseptic terrain [Clarke], [Hale].
• Night sweats with bronchial fetor — systemic tie [Boericke].
• Offensive body odour in septic colds — adjunctive guide [Clarke].

Allen, T. F. — Encyclopædia of Pure Materia Medica (1874–79): provings/toxicology—gastric burning, albuminuria, respiratory depression; catarrhal notes.
Hering, C. — The Guiding Symptoms of Our Materia Medica (1879): clinical confirmations in catarrh, influenza, intermittent fevers; modalities (open air, drainage).
Hughes, R. — A Manual of Pharmacodynamics (1870): pharmacology of Eucalyptus; antiperiodic reputation; marsh/damp influence; gastric/renal drug effects.
Clarke, J. H. — A Dictionary of Practical Materia Medica (1900): substance background; antiseptic sphere; fetid catarrh; intermittent fevers; modalities and clinical uses.
Boericke, W. — Pocket Manual of Homœopathic Materia Medica (1901): keynotes—loose fetid cough, better after expectoration; influenza; bronchitis; night sweats; open-air craving.
Hale, E. M. — New Remedies (var. eds., late 19th c.): antiseptic/deodorant uses; inhalations; wound applications; clinical pointers for fetid catarrh.
Boger, C. M. — Synoptic Key of the Materia Medica (1915): comparisons (Bry., Kali-s., Ant-t., Stann.); meteorologic aggravations; chest modalities.
Farrington, E. A. — Clinical Materia Medica (1887): differentials in catarrh/bronchitis (Kali bich., Stann., Ant-t., Allium cepa); sepsis contrasts.
Dewey, W. A. — Practical Homœopathic Therapeutics (1901): influenza groupings; bronchiectasis tips; repetition strategies; post-malarial convalescence.
Kent, J. T. — Lectures on Homœopathic Materia Medica (1905): comparative philosophy (Ars., Merc., Hepar) applied to catarrh/sepsis; antidotal notes.
Vithoulkas, G. — Materia Medica Viva (1991–93): potency and repetition strategies in chronic catarrhal and post-infective states (applied to Eucalyptus cases).
Nash, E. B. — Leaders in Homœopathic Therapeutics (1899): general remarks on influenza/catarrh (for contrasts with Gels./Bry.) informing sequencing.