Last modified on February 6th, 2019

Sarsaparilla homeopathy medicine – drug proving symptoms from Encyclopedia of Pure Materia Medica by TF Allen, published in 1874. It has contributions from R Hughes, C Hering, C Dunham, and A Lippe.


Smilax officinalis, H. B. K. (probably), (the brown Sarsaparilla from Jamaica, St. Domingo, etc.). Natural order: Smilaceae.

Preparation: Triturations of the dried root.


Cheerfulness. Merriness and feeling of strength, Merrier and livelier than usual (first and second days). In very good spirits, merry and full of fun, all day. Happier and livelier than usual (first and second days). Soul and body restless before midnight. The soul is affected inordinately by the pains; the mind is depressed, the mood dull; he feels wretchedly, and moans involuntarily. Inclined to weep, and out of humor, forenoon. Sad and depressed, absorbed within himself. Much depressed in mind and sluggish. Depression of spirits. Great anxiety, first in the head, then in the whole body, with trembling, mostly in the feet, forenoon. Anxiety and fears, with palpitation of heart. Great anxiety with constriction of the throat. She thinks she cannot bear the headache. Dulness of temper, and stoppage of nose.

Silent moroseness. Very easily vexed and cannot forget the cause of vexation. Extremely ill-humored, even vexed “by the fly on the wall.” Every word may offend him. Ill-tempered and moody, afternoon. Cross, but with disposition to work. Very ill-humored, in the morning, with heaviness of the head (eighth day). Cross, without disinclination to work. Very ill-humored all day; better in the evening (seventh day). Has aversion for everything; nothing gives her pleasure; only in the forenoon (sixth day).

Very changeable humor, every two or three days (fifth day).

Inclined to work, in the afternoon. Inactive, sluggish, indisposed to work, awkward. Inaptitude for mental application (immediately). Indisposed to work, cross, and hot in the face (immediately). Spelled the word “write” “right,” and could not think for a minute how it should be spelled (sixth day). Felt it almost too much trouble to write down;the symptoms and to seek for their conditions (sixth day). Absent-minded. Stupid and heavy in the head (eighth day); sometimes as if the temples were being compressed, forenoon, 11 o’clock. Stupor, weakness of head.

Without consciousness; cannot speak, with headache. Loss of consciousness after nausea and dizziness; fell down.


Vertigo. Vertigo, while standing at the window, he suddenly fell backwards on the floor unconsciousness; at the same time the throat was swollen; sour eructation before and afterwards, thereupon the chest felt as if pressed; severe perspiration in the night. Vertigo, with nausea, mornings, while gazing long at one object (fifth day). Vertigo and unsteady gait, as if intoxicated (soon). In the afternoon, vertigo going round from left forwards to right, when sitting indoors (sixteenth day).

Vertigo, frequently all the forenoon (ninth day). Vertigo, while gazing long at one object. Vertigo, while sitting and walking; the head inclined to drop forward. Staggering backwards, when standing after stool, at 3.30 A.M. (seventh day). Slight giddiness and heat all over, as if from a close air (it was a cold rainy day), (after five minutes). General Head. Head inclined to drop forward. Heaviness in the head, with tension in the right side of the neck, particularly on moving the head (first day). Heaviness of head, with toothache. Lightness or pain in head. Head stupid and dull, all the forenoon; in the afternoon, ill-tempered and moody. Weakness in the head, as after a fever, with stupor. Dulness in the head, with flatulency. The dulness of the head always passed off, towards evening. Dulness of the head after long sitting, with mist before the eyes; lassitude of limbs; stoppage of the nose and gloomy mood. Dull headache, as if bound or screwed together; afternoon, 2 o’clock (fourth day).

Headache, like pressure from a great weight in the head, which is inclined to sink forward. Tearing pressure in the head, here and there, increased by motion and walking. Rending deep in the brain, only on talking and walking, not while in rest (second day). Cramp like one-sided headache, beginning with flickering and blackness before the eyes; at the same time he seems to be without berated in his head. Hammering headache, evenings; worse at night, with much nausea and sour vomiting. The pains about the head are worse from touch and on walking. Pains like lightning about the head. Dull tremor, with a waving in the head, afternoon, 2 o’clock (fourth day). Throbbing in head, till towards noon. Lying in bed on right side, transient banging sound in head like the sound of a gong when struck (twenty-third night). A kind of tingling in the head, as if a large bell had been struck, towards noon. Stinging, now in the head, now in the right ear, now in the left (sixth day). Forehead. Heavy feeling in the forehead. Pressing and heavy feeling around the whole forehead, in forenoon and after dinner (second day). Pressing in left side of forehead. Pressing in forehead and occiput. Pressure in right frontal protuberance, with fine stitches slowly developing. Severe pressing and then stinging in left frontal protuberance. Tearing in the whole frontal region, afternoon, 6.30 P.M. (fourth day). Penetrating stitches in left frontal protuberance, evening. Acute fine stitches in the middle of the forehead. Penetrating stinging in the region of the right frontal protuberance, evening, 7 o’clock, she thinks she cannot bear it, for half an hour (third day). Stinging in left forehead. Violent stinging in forehead, passing off out of doors, forenoon (fifth day). Dull stinging on left frontal protuberance. Throbbing in right frontal region, on walking out doors (first day). Temples.

Head somewhat heavy in left temple, till noon. Heaviness in the left temple. Headache, heavy in each temple, extending to lower teeth, afternoon 2 o’clock (fourth day). Pressing-stinging pain about temporal bone, increased by touching. Stinging drawing from right mastoid process to left frontal protuberance. Burning dull stitches on left temporal bone. Dull stitches at root of right mastoid process, passing off on being touched, A piercing- startling stitch in right temple, afternoon, 1 o’clock (seventh day). At midnight, throbbing in right temple, soon passing;off in an undefined pain (second day). Vertex. Last night in bed, throbbing pain for a few minutes in right anterior vertex; in the morning, discovered a large red pimple on neck, just behind angle of left lower jaw, smarting severely on being scratched (twelfth day). Frequent stitches on vertex. Parietals. Pressing in left side of head, particularly in the temple, during rest and motion.

Sensation as if screwed together in both sides of the head, half an hour after breakfast (sixth day). A pressure-like tearing in the whole left of the head. Pressing and itching deep in the right half of head, morning (eight day). Pressing, with frequent stitches, in left side of head, morning (ninety day). Beating and sounding in the right side of head, deep in the brain, forenoon (ninth day). Violent throbbing in right side of head, deep in brain. Violent pressing-tearing stitches in right side of head that he shudders. Frequent stitches in side of head. Dull stinging in left side of head, to the nape of the neck. Stinging drawing on right parietal and temporal bone. Stinging tearing on parietal bone in left vertex. Occiput. Stinging pain in left occiput. Twitching on left side of occiput. External Head.

Falling off of the hair, with great sensitiveness of the scalp on combing (sixth day). External headache, like compressions and incisions. Pulsating stitches on the forehead. Frequent itching on the whole head, does not cease after scratching (eighth day).

Itching on scalp, disappearing after scratching (sixth day).

Scalp, fine pricking itching. Itching in right half of head.

Itching on posterior part of scalp. Severe pressure and stitches on vertex, towards right side.


Bruised pain in right eye on turning eyes to left (sixteenth day). Pain of the eyes when he looks at anything in the daylight.

Pressure in left eye, as from a grain of sand. Pressure in the left, then in the right eye, with dimness of vision. Pressing in eyes alternates with burning. Stinging frequent in both eyes, as if dust or sand were in them; outdoors it seems better. Stinging in the eyes on closing the lids, and violent pain when the closed eyes are pressed upon; at the same time, a broad red stripe extending from cornea to the outer canthus; the inner corners are turned blue, and the right is somewhat swollen (twenty-first day). On closing eyes stinging in them. Reading by candlelight hurts eyes, paper looks red. In the morning all objects affect the eyes. Lids. Inflamed dry eyelids. Violent burning and agglutination of the eyelids, on awaking in the morning.

Quivering in right upper eyelid. Burning in the eyelids constantly, sometimes alternating with pressing pain in the same.

Lachrymal Apparatus. Lachrymation of the eyes in the daytime; in the morning they are agglutinated (fourth day). Lachrymation of the eyes, every other day (sixth day). Tears in eyes when gaping.

Pupil. Pupils dilated (in two hours). Ball. Pressing in ball of the eye, evenings, while reading by candlelight, with red shine of paper. Vision. Flickering before eyes, and headache. Mist before the eyes and dulness. Great dimness of left eye, as if a gauze were spread over it, afternoon (sixth day). Dimness of vision, as in a fog (first day). Dimness of vision. Blackness and headache.


Inflammation and swelling of a gland under the right ear, which begins to suppurate on sixth day. Drawing and visible twitching in the lobule of left ear, later either in the right or left.

Painful constriction about external right ear. Stinging beneath and in front of left ear, as with a bristle, in the morning (sixth day). Tearing upwards behind left ear, frequently in the afternoon. In the ear violent pressure and compression, up into the temple, where it also presses. Tearing in right ear, mornings (fourth day). Tearing pressure in right cartilage and external meatus of ear. Contracting sensation in right ear. Ulcerative pain deep in left ear and around the anterior part of the same, morning (sixth day). Violent dull stitches, deep in right ear, forenoon (ninth day). Tolling of bells in left ear, for some time, afternoon (sixth day). Ringing in left ear. Every word reverberates in his head, cannot speak, with headache.


Coryza, especially on right side (tenth day). Coryza and cough.

Stuffed coryza, without sneezing, no air passes through the nose.

Very thick mucus from the nose. Frequent nosebleed (sixth day); at night, after dream of fighting. Epistaxis, with feeling as if small bubbles were bursting in the nose (third day). In the evening, bleeding from right nostril when blowing nose, light- colored blood (fourth day). Bleeding from left nostril while blowing nose (eleventh day). Bleeding from right nostril.

Nosebleed. Sneezing in the morning, after rising. Sneezing, fails in the attempt (eighth day). Sneezing and running coryza, only in the morning (second day). Stoppage of the nose in the forenoon, a short time. Stoppage of nose and gloomy mood. Woke with dry obstruction of right nostril (sixth day). Burning in the nose, on blowing it. In the nose burning on blowing it, with a dry cough.

In the tip of the nose, pricking as if caused by a needle.


Twitching of right side of upper lip (after three hours and a half). Violent pain in the face, as if bruised, about both inferior orbital margins, on waking in the morning, but only on pressure (twenty-first day). Drawing, stinging, tearing in the masticatory muscles of right side, which seem to have spasmodically contracted. Pressing-stinging pain on lower inner edge of right lower jaw, but only on touch, and on bending the head back. Stiffness and tension in masseter muscles and joints of the jaw, on moving the part, thirty minutes, forenoon (sixth day). The jaws pain as if they would break.


Teeth. Chattering of teeth, with chill. Toothache on the right side, with creeping, crawling, tingling in the roots of the teeth; after picking them until they bleed, the pain, which had been much more severe for awhile, ceases, evening (thirteenth and fourteenth days). Drawing toothache in the right lower row, with heaviness of the head, particularly on the right side, from 4 A.M. till evening (third day). The right upper teeth are very sensitive on biting on them (fourteenth and fifteenth days).

Tearing in the teeth from cold draft of air or cold drink. Molars of left side and one on the right begin to ache. Toothache, on two successive evenings (eighth day). Stinging in a tooth which had been painful for a long time, forenoon (ninth day). Gums.

Swelling and sore pain of the gums of the inner side of lower maxilla. The gums of the left lower row are painful on smoking tobacco, afternoon (third day). Stinging tearing in the gums and the root of the last right lower molar. Tearing in the gums of the right lower row, in the evening (fourth day). Tongue. Whitish coating on the tongue, in the morning, with natural taste (third day). Aphthae on the tongue and palate (seventeenth day). Tongue is rough several mornings on waking, passing off after eating.

Stitches in the tongue. General Mouth. Offensive breath. Slimy mouth in the morning (sixth day). Dry mouth, after stool, at 3.30 A.M. (seventh day). Dryness in the mouth, without thirst, forenoon. Dryness in mouth and throat, mornings in bed (seventh day). Woke with dry mouth (twenty-second day). Pressing-drawing pain in soft palate. Saliva. Frequently tasteless water collects in the mouth, forenoon, till 1 P.M. (second day). Salivation.

Taste. Woke with fishy disagreeable taste in mouth (sixth day).

Metallic taste for two days. Sweetish taste in the mouth, while smoking tobacco. Insipid sweetish taste. Taste in throat is always sweetish, like liquorice, several days. Herbaceous taste in mouth. Nauseous herbaceous taste in the mouth. Bitter taste in the mouth, in the morning, after rising, soon abating. Bitter taste on the under lip, mornings (eighth day). Bitter taste of rye bread. Disagreeable, very sour, and slimy taste in the fauces, mornings, like sour dough (leaven).


Constant hawking of mucus in the morning; the mucus is constantly reproduced in abundance (second day). Phlegm in throat all day, which she could not detach or swallow (tenth day). Tough mucus in throat, mornings; cannot be removed by hawking, for several days.

Mucus in throat tastes like blood (eleventh day). Hoarseness in the throat, every other day (after six days). Hoarseness in the throat frequently returning (after three hours). Constricting feeling in the throat and chest, with difficult breathing, frequently in the day (fifth day). Spasmodic constriction in the throat; he is forced to loosen his clothes, the cravat, the shirt, in order to get sufficient breath, but without avail (sixth day). Sensation of constriction in the posterior portion of the throat. Irritation and constriction in the throat.

Roughness in the throat excites cough. Rough, hoarse, and dry in the throat, in the morning, on awaking, for a quarter of an hour.

During cough, roughness in the throat, mornings (second day).

Dryness in the throat and stinging on swallowing, morning (seventh day). Spasmodic urging or straining in the throat through the whole night, but frequently vomiting. When swallowing, a pain in the throat; a feeling of rawness on the larynx, a pressing sensation moving about in larynx, with a cough at night and in the morning, with a colorless tasteless expectoration; when he coughs the larynx pains most. Pain in right side of throat, as if caused by a sharp pelt of barley or wheat, up along at the side and about at the ear, only passing off in the afternoon, after lying down (first day). Irritation in the posterior portion of the throat. Stinging from throat out of ear. In fauces tickling ulcerative sensation, causing a cough. In the morning very much burning in the oesophagus (fourth day). In the swallow acrid sensation. Throat swollen, with falling down unconscious. At 10.30 A.M., transient tensive feeling (not pain) in region of right submaxillary gland (thirteenth day).


Appetite and Thirst. More appetite than usual, for several days.

He longs for his dinner, with an ardent desire. (Wants nothing but juicy fruits). Gnawing hungry sensation. No appetite for smoking tobacco, the taste of which seems to him to be entirely changed (fifth, sixth, and seventh days). All his appetite is gone. No appetite for breakfast (sixth day). No appetite and no hunger; food had not enough flavor, and after a meal it seemed to him as if he had eaten nothing; as if the stomach were without sensation. No hunger or appetite; he ate but little at noon (second day). Loathing at the thought of the food eaten. Ability to go about all day fasting. Thirst, even in the morning, continuing all day, with general warmth (third day). Thirst, frequently throughout the day, with one who is usually not thirsty. Thirst for water, in the afternoon, 2 o’clock, after chill before dinner (first day). Absence of thirst during meals, contrary to his habit (first to fourth day). Entire absence of thirst during the whole proving. Eructations. First bitter and sour then empty eructations. Sour eructations before and after attack. Continual eructation, with shuddering. Eructation, with taste of the food, after dinner (fifth day). Bitter eructation in the morning, after rising, with bitter taste in the mouth (second day). Bitter eructation during dinner; ceases after the meal (second day). After eating the usual wasser, and drinking a little cold water after it, the soup eructated with a bitter taste (fourth day). Belching up of bitter sour matter, evenings; he had to spit it out three times. Belching of sour water, afternoon. Continuous sour eructation. Frequent empty eructation, forenoon and evening; evening (second day), and forenoon (fifth day). Belching of bitter water, before and once after dinner (fourth day). Sour eructation after breakfast. Constant imperfect eructations. Ineffectual inclination to eruct, with spasmodic twisting in stomach, immediately after dinner, lasting one minute. Hiccough. Hiccough after dinner, three spells (second day). Hiccough, 6 P.M., for a long while. Hiccoughing eructation (soon). Nausea and Vomiting. Constant nausea, without inclination to vomit, afternoon (third day). Nausea. Nausea, with an acrid sensation on the tongue and in the swallow. It has nauseating effects. Much nausea, with constant ineffectual inclination to vomit, the whole forenoon (first day). Severe nausea, mornings, increased to vomiting, with increased herbaceous taste in the mouth. Nausea after breakfast. Nausea, with vertigo. Nausea, with headache. Nausea, with constriction of the stomach. Nausea and exhaustion after dinner. Nausea in the throat, caused by the rising of a nauseous vapor into the mouth, with affection of the head. Nausea and inclination to vomit; it comes up constantly (third day). Constant inclination to vomit. Efforts to vomit. She has to vomit often, and each time her nose bleeds. Vomiting of bitter substances with great efforts. He said it made him as sick as death and broke all his bones. Sick stomach and prostration, kind of coryza, had to lie down, and could not move; pulse somewhat retarded. Vomits her breakfast after pain in the stomach. Sour vomiting; with headache. Stomach. It he eats ever so little, it nevertheless distends his stomach as much as if he had eaten a great deal. During menses griping in pit of stomach, extending towards the sacrum. Spasmodic twisting in stomach.

Often spasmodic sensation in pit of stomach. Constriction in the stomach, with nausea, vanishing at night (ninth day). Pressure in pit of stomach, evening, while singing (fourth day). Pressing pain in epigastrium and directly under the ensiform cartilage, increased by touch. Pressure in stomach, with soft stool. Sense of weakness in the stomach. It is very subject to lie heavy on the stomach and to produce indigestion. Heat and burning in the stomach (soon). Heat in the stomach, as after spirituous beverages, after eating a mouthful of bread (sixth day).


Hypochondria. Stinging in left hypochondriac region, particularly on bending toward the right; continuing a long time, forenoon (first day). Dull pressure in the region of the liver; she often had returns of it; felt only in the morning on waking; better after getting up and walking about; after Sepia high, it disappeared for ten or twelve days. The left hypochondriac region pains as if bruised, with throbbing, 1 P.M. Umbilicus and Sides.

Cutting around the navel, always on gaping (eighth day). Cutting in a small spot about the navel, morning (eighth day). Cutting around the navel, then moving about in the abdomen, disappearing after passage of flatus, forenoon (eighth day). Painful pressure inwards and pinching in left side of abdomen, in small spot, aggravated only by deep inspiration. Pressing pain in left side of abdomen. Cutting pain on a narrow line of the left side of the abdomen, transversely towards the back; then rolling in the belly and disappearance of the pain (sixth day). Stinging, now in the right, now in the left side of abdomen (seventh day). Severe stinging under the right ribs and in abdomen, one hour after dinner (sixth day). Stinging in the left side of abdomen (soon).

Stinging in left side of abdomen, in the morning, while sitting; vanishing while walking. General Abdomen. Great fullness in abdomen, after eating or drinking anything. Distension of abdomen (sixth day). Frequent discharge of flatus all day (after eight days) Flatulency, with dulness in the head. Discharge of offensive flatus. Discharge of flatus of fetid odor, evenings (third day). Discharge of flatus upwards and downwards. Rumbling in abdomen, with feeling of emptiness in the same. Rumbling and rolling in abdomen, every day, without diarrhoea and without distension. Rolling in the belly and fermentation. Rumbling and clucking in abdomen, with feeling of emptiness in the same.

Rumbling and growling in bowels. Loud quacking in abdomen, as in spasms; remitting for a while after eructation (twenty-first and twenty-third days). Abdomen very sensitive on pressure, 10 A.M.

During the diarrhoea rolling and fermentation in abdomen, with discharge of stinking flatus (seventh day). During menses frequent griping colic. Colic, with diarrhoea. Colicky abdominal pain in the morning (second day). Feels as if empty and disemboweled in abdomen, soon after breakfast (eighth day).

Frequent spasmodic sensations in abdomen. Constriction of intestines. Contracting pain of the bowels, then violent rumbling and grumbling; now around the navel, now upward toward the chest, now again downward, as if diarrhoea were to follow, forenoon (second day). Pinching and rolling in abdomen, from 5 P.M. till midnight, preventing sleep. Pinching and rumbling in abdomen, after eating; later passing up on left side towards the stomach, and only dispelled by doubling up. Pinching colic during menses.

Cutting in abdomen, with scanty stool. Violent cutting in abdomen, 5 P.M., then semifluid diarrhoeic stools (sixth day).

Severe pinching in abdomen. Severe pinching in abdomen, and thereupon painful contraction of sphincter ani. Pressing drawing in abdomen, as after cold. Motion in the bowels, with burning (soon). Motion in abdomen, as before diarrhoea, all day. Feeling of inactivity of bowels. Burning and heat in abdomen. Coldness and motion in abdomen (ninth day). Internal chilliness in the abdomen. Hypogastrium and Iliac Region. Straining constriction in hypogastrium, vanishing after passage of flatus, evening and forenoon (seventeenth and eighteenth days). A moving and tossing about in lower belly, as if he had taken a purgative, but without diarrhoea, the whole day (after forty-eight hours). Pinching in left inguinal region. In right groin severe tension. On appearance of menses, soreness in the bend of the right groin, and urging to urinate. Slight soreness in right groin (sixth day). Soreness in the left groin, as the pain in the testicles and spermatic cords got better (eighth day).


Ulcer on the anus of the size of a walnut, bearing a black pustule, soon opening with pain, and discharging pus. During the diarrhoeic stool sensation of corroding acridity in rectum, during the discharge. Tearing and cutting in rectum. Painful contraction of sphincter ani, after pinching in abdomen. Severe aching in anus, with frequent desire for stool; better after stool, but went away very slowly; it was relieved by hard pressure upwards in anus, at 3.30 A.M. (seventh day). Soreness in the anus, wakes him at night, and then changes into a burning itching, lasting all day. Burning in anus after stool, after fluid stools. Itching on the right side of anus, dispelled by scratching (eighth day). Tenesmus in anus after stool.

Uncontrollable urgent desire; but nevertheless only scanty soft stool, passing with great difficulty through the seemingly contracted rectum. Urgent desire, with contraction of intestines, and enormous pressure downwards, as if contents of abdomen were to be pressed out, for several minutes; then at last something passes with a jerk, with severe tearing and cutting in rectum; thereupon immediately again desire to go to stool, as if rectum were being pressed out, so that he can scarcely sit on account of pain. Frequent urging to go to stool, with scanty discharge, and with tenesmus in the anus afterwards (second day). Stool accompanied with much urging and straining in the rectum. Desire, but no stool.


Frequent diarrhoeic discharges, four or five times during the day, with colic (fifth and sixth days). Semifluid diarrhoeic stools. Twice diarrhoea (fourth day). Hurried action of bowels before breakfast. Stool was semifluid toward the end (ninth day).

Very soft stool, without any other complaint (second day). Fluid stools, evenings, with burning in anus afterwards. Soft stool, with tenesmus in anus after it (second day). Stool softer than usual, accompanied with slight pressure in region of stomach.

Scanty consistent stool, accompanied by cutting in the abdomen.

Pitchy, sticky, adhesive stool several days. Stool, the first part of which was hard, the last soft, with subsequent burning in the anus. Scanty stool, preceded by evacuation of much flatus, at 3.30 A.M. (seventh day); had had a natural stool the day before.

Twice, consistent stool (first day). Soft copious stool, afternoon (first day). Very hard stool (second day). Hard stool (first day); constipation (second day); at first hard and then passages of soft faeces (third day). Hard stool and frequent urination (tenth day). Stool and urine delayed. No stool (third and fourth days).

Urinary Organs

Painful constriction of the bladder, without urging. The urine only dribbles away when sitting, the bladder when in that posture feeling bent forwards upon itself; on standing, the urine passes freely; this lasted three or four days (after seven days).

Discharge of yellow pus from the urethra, with redness and inflammation of the glans, and fever in the evening, with rigors (seventh day). Thin, powerless stream of urine. Pain in urethra, on waking (fourteenth night). Burning while the urine passes, with discharge of elongated flakes. Sharp cutting pains in the urethra, after some hours. Burning with urination. Burning in the whole urethra always on passing water. During passage of urine, scratching scraping in the whole urethra (after twelve hours).

Desire to urinate wakes him from sleep every morning. Urging to urinate ceases with the perfect discharge of menses. Frequent desire to urinate, with scanty discharge, accompanied by burning (first day). Urging to urinate on appearance of menses. Nearly all day he has urgent desire to urinate, but little urine passes.

About the author

TF Allen

TF Allen

Dr. Timothy Field Allen, M.D. ( 1837 - 1902)
Born in 1837in Westminster, Vermont. . He was an orthodox doctor who converted to homeopathy
Dr. Allen compiled the Encyclopedia of Pure Materia Medica over the course of 10 years.
In 1881 Allen published A Critical Revision of the Encyclopedia of Pure Materia Medica.

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