Cobaltum 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….


The element, Co.

Preparation: Trituration of the pure metal.



Great exhilaration of spirits during the day (third day).

Great vivacity (fifth day). Great vivacity and rapid flow of thought. Low-spirited; thinks too little of himself. Condemned, mean feeling, as though guilty of some deed of which others knew; as if he could not look one in the face (after the fourth dose), 6 A.M. and several times during the day (third day). All mental excitement greatly increases the suffering (1st dil).


Desire for study (second day). Increased desire for study (third day). Much more inclination to study. Indisposed to mental or physical labor; want of energy; low-spirited; thinks too little of himself. Dulness and weakness, with aversion to mental exercise (after nine hours).


Dulness and fullness, with bruised pain in the head, especially in the forehead and temples; morning (second day). Head feels dull and stupid, with a dull pressive pain in temples, which was worse on moving; forenoon (second day). Pain in the head (second day).

Pain in head, worse when bending forward, especially the occiput (second day). Pain in head and small of back (second day). Pain in head, especially occiput, at the middle of the day (second day).

Feeling as if head grew large during stool, with dizziness and weakness; pain in head continued for an hour after stool (after six hours). Dull aching pain in head from 1 till 8 P.M.

increasing till then, mostly in forehead (third day). Headache in morning, with beating, and sore aching all over (seventh day).

Headache, in morning when rising (second day). Headache, on waking and during the day (third day). Headache all forenoon (second day). Headache at 12, with nausea and languor (second day). On walking headache. Slight headache for two days, in morning till 10 o’clock and again in afternoon (fourth day).

Slight headache in afternoon (fourth day). Slight headache in room, going off in open air (soon after). Dull headache all day, from waking in the morning, worse in a room (second day).

Dull headache, especially in forehead, with a feeling in stomach as if it contained undigested food (third day). Sensation as if the brain went up and down, when stepping (seventh day).


Pain in forehead (sixth day). Pain in forehead, after rising (second day). Pain in forehead, worse from stooping (fourth day).

Pain in forehead, with pain in back part of eyes (after half an hour). Pain in forehead, with sense of fullness at stomach, as if filled with air (third day). Severe pain in forehead, soon after rising (second day).


Severe pain in temples (after one hour). Pain in left temple during morning, with feeling of languor and nausea at stomach; constant desire for stool, and sensation as if diarrhoea would set in, but it did not (second day). Pain, like a tearing, in the right temple near to the orbit; forenoon (first day).


Pain in top of head, when rising from a seat, with prickling pain in stomach (third day). The top of the head at every jar feels as if it would come off (seventh day).


Pain in occiput, in morning (fifth day). Headache in occiput (second day). Headache in occiput in morning, worse in open air; continuing till 3 P.M. (second day). Headache in occiput, coming on at noon.

External Head.

Pimples, very sore, like a boil in the edge of the hair on the back of the head (third day). Great itching of hairy scalp at night (second day). Great itching of the hairy scalp, and in the beard under the chin, with burning when scratching (second day).


The eyes, which were previously weak, and the lids red and tender, are much aggravated, with sensation as if sand were under the lid (third day). Eyes dry. Pain in the eyes during the day and evening. Pain in eyes, when coming to the light (third day).

Burning in eyes, especially the upper lids (after one hour).

Aching pain in eyes, when writing (after twenty-one hours and a half). Fine dartings in eyes when writing, with feeling, when opening the lids, as if little strings were holding them together and were snapping. Darting pain in eyes, on coming into the light from a room, at 2.30 P.M., in bright sunshine (third day).

Shooting pain in eyes, on coming to outdoor light from a room (third day). Eyes smart in light (ninth day). Smarting pain in left corner of left eye, as from hot water, with severe pain in top of head (third day). Severe smarting pain in eyes when writing, with almost loss of vision (second day).

Eyes worse in open air (third day).


Lids smooth forming scales on the upper lid (third day).

Sensation as if something were under the upper lid, obliging him to rub it (sixth day). Pain and smarting in upper eyelids as soon as he looks at anything steadily (second day). A good deal of burning in lids. Smarting in eyelids (sixth day). Smarting of eyelids as soon as he begins to use them (third day). Smarting pain on inner side of upper lids (second day). Smarting pain in eyelids, in evening (third day).

Lachrymal Apparatus. Lachrymation and pain in eyes, especially in cold air (second day). Profuse lachrymation in open air, with water from nose.


Some pain in ball (third day).


Flickering before the eyes (muscae volitantes), dimness of sight; while reading, the letters look blurred (three hours after 1st dil).


Aching pain in left ear (ninth day). Aching pain in left ear in evening (sixth day). Aching pain in left ear (like slight humming), second day). Aching-beating pain in left ear, in evening (fourth day).


Humming in left ear (seventh day).


Thin discharge from the nose and occasional sneezing (second day); symptoms of a cold continue (third day). Feeling as if of a cold in the head (second day). Nose feels dry and filled up with dry scales, with itching, especially of left nostril (second day).

Nose feels as if obstructed with mucus (second day).

Stitching of left side of nose at the angle; it burns on being scratched (second day). A very sensitive spot on the nose, at the termination of the cartilage, being very painful on pressure, four following days.


Putrid sickish smell before the nose (second day).


Peeling of the lips, and soreness; they bleed easily.



Pain in hollow tooth, which feels too long; sensitive to touch.

Pain in hollow tooth (first molar of lower jaw, left side), with swelling of the gums, and great tenderness around it; worse from inhaling cold air; feels as if it would ulcerate. Pain and soreness of hollow tooth; feels as if too long for a while, and then goes off again (second day). Paroxysms of pain in the hollow tooth (second day).


Tongue white (second day). Tongue coated white (second day).

Tongue coated white, with cracks across the middle (second day).

Tongue covered with a thick white coat. Very thick white mucus on tongue, with flat, mucous taste (third day).

General Mouth.

Sore on left side of mouth, opposite stomach tooth (sixth day).

Pricking in roof of mouth, as from a pain (after half an hour).

Stinging pain in roof of mouth, extending through to left ear (second day).


Much saliva accumulates (third day). Water accumulates in mouth, with frequent swallowing (after one hour and second day).

Constant secretion of water in mouth, and swallowing (second day).


Flat taste (second day). Flat taste in mouth, and rising of sour water, which has an acrid feeling in throat (second day).

Nauseous, flat taste in morning (third day). Flat mucous taste in mouth (second day). Bad mucous taste in mouth (second day). Bad taste in the mouth, with belching of wind; morning (second day).

Sweet taste of mucus, with expectoration of thick, white, frothy mucus, with lumps in it (second day).



Throat filled with mucus in the morning (third day). Throat filled with white mucus (second day). Hawking of lumpy mucus in morning. Hawking and spitting of mucus in the morning, first of lumps and then thinner (third day). Uncomfortable feeling in the throat, with pain on empty swallowing and gaping (second day).

Dry throat, when rising (third day). Throat dry and sore, feeling as if raw. Throat feels dry and sore on swallowing, feeling as if something dry had collected in it, on rising in morning (second day). Sensation as if something sticks in throat, causing him to hawk, which makes it feel sore (second day). Heat rising in throat, as if from stomach.

Sore throat in morning, when hawking (ninth and tenth days).

Soreness of throat when hawking as if raw (fourth day). Sore raw feeling in throat, when hawking (fifth day). Frequent desire to swallow, with accumulation of water in mouth (second day). After discharging phlegm from the throat he feels generally much relieved.

External Throat.

Drawing pain in left sub-maxillary gland (second day).



Appetite somewhat diminished (third and sixth days).

Not much desire for food; ate lightly at dinner. No appetite (second day). No appetite for supper (second day).

Eructation and Hiccough.

Much rising of wind from stomach (third day). Belching of wind (after six hours). Rising of sour water from stomach. Rising of bitter water in mouth, an hour after dinner (third day). Rising of bitter water, with pain in stomach, and afterwards dryness of throat (after one hour). Rising of hot bitter water, in the afternoon (third day). Gulping up of sour, bitter water. Hiccough after dinner (second day). Hiccough set in soon after dinner, and continued without cessation till 6 P.M.; after supper, again renewed.

Attack of hiccough, with shooting pain in forehead till midnight (after one hour).


Nausea at stomach, with pain in forehead (after four hours).


Sour stomach, with headache, as if it would burst; in evening, after supper, had to lie down; 11 P.M., increases in severity; an hour after, watery diarrhoea, with tenesmus; sour taste, with nausea, remained till sleep (fifth day). Pain in stomach (after one hour). Pain in stomach and abdomen (fourth day). Pain in stomach, one hour after rising, with headache (second day). Pain in stomach after eating, especially after dinner, with pain in the abdomen, worse by pressure, and feeling of great uneasiness; had to move about, as if he could not keep still (second day).

Pain in stomach after a meal (fourth day). Pain in stomach after a light meal (ninth day). Pain in stomach soon after dinner (fourth day). Pain in stomach, with colic in abdomen and sensation as if diarrhoea would come on (second day). Severe pain in stomach, as if from hunger, before dinner, which continues till dinner, and is partially relieved by eating (second day).

Sensation of fullness and hardness in stomach, as if filled with wind (third day). Pressure in stomach, as if from wind (second day).

Soreness in pit of stomach, caused by the constant hiccough (after one hour). Soreness in the region of the stomach on taking a deep inspiration, morning (second day).



Dull pain in the left hypochondrium, with sour eructations (third day). Feeling in left side, above spleen, as if it would drop down, worse when walking; disappears when sitting still (fourth day). Sharp pain in the region of the spleen, worse on taking a deep inspiration (third day).


Pain in umbilical region one hour after eating, worse from contracting the walls of the abdomen (second day).

General Abdomen.

Rumbling in bowels (fourth day). Loud rumbling in bowels (second day). Feeling as if diarrhoea would come on, with rumbling in bowels (after five hours). Strange but not unpleasant sensation in bowels, as after diarrhoea. Strange but not unpleasant sensation in the bowels, as after diarrhoea, all the time since the stool became more hard and natural. Feeling of emptiness in abdomen, at the umbilicus (second day). Pain in abdomen, in evening and at night (second day). Pain as from a fullness in abdomen, soon after a light dinner (second day). Colic, on waking, at 5 A.M., then watery stool, with tenesmus (sixth day).

Colic during stool (fourth day). Severe cutting colic before stool (second day). Colic pain at 4 A.M., better after a watery stool, having had no passage for two days (eighth day).

Hypogastrium and Iliac Region.

Yellow-brown spots on lower part of abdomen, about genitals (tenth day). Severe colic in lower part of abdomen (after one hour). Pain in abdomen, low down, in evening (second day). Pain in left groin and small of back (sixth day).

Rectum and Anus.


Burning in rectum during stool, and continuing long afterwards (second day). Pressing in the rectum (second day).


During the whole day, constant dropping of blood from the anus, none with the stool; has often had some bloody marks on his faeces (first day). Pressure towards the anus, increasing till stool (second day).


Urgent desire for stool, with slight cutting in abdomen; while walking, desire worse than when standing still (after five hours). Tenesmus after stool (after six hours).



Stool twice per day (before, only once). A profuse, stool, watery, spouting; in an hour, another stool (after five hours).

Stool at 9 A.M. and at 9 P.M.; the former small and hard, the latter small, soft, painless (third day). Soft diarrhoeic stool, with tenesmus and colic (second day). Large stool, soft, thin (diarrhoeic), with much tenesmus, and severe colicky pain in lower part of abdomen during stool, as if the bowels would protrude, and aching pain in sphincter ani, which continued for an hour after stool (after six hours). Stool at 4.30 P.M., soft, with stinging pain during and after for some time (second day).

Stool at 4.45 P.M., with cutting pain in abdomen before stool, and pressing in rectum (fourth day). Stool at 9 A.M., natural, but small in quantity (fourth day).

Stool more natural (third day), and becomes in a few days quite hard and natural, which has not been the case for three years.

Instead of several soft stools during the day, one well formed in the evening first day).


Small stool, with tenesmus, at 4 P.M. (second day).

Small hard stool (fifth day). Stool at 4 P.M. small, hard, having had none for two days (second day). Stool small and hard (third day).

Stool small and hard, at 10 P.M. with sensation of scratching in rectum (second day). Small, dry, hard lumpy stool at 11 P.M.

(third day). Stool scanty and hard (after fourteen hours and a half). No passage for two days.

Urinary Organs.


Pain in the urethra, with the emissions. Burning in urethra during micturition (second day). Acute pain in the urethra while standing, with a bruised feeling in the back and loins towards the latter part of the day. Smarting in end of urethra during micturition, lasting but a short time after (second day).

Frequent desire to urinate. Constant desire to urinate every twenty minutes, all the forenoon, after drinking coffee (earlier than usual), with discharge of much pale urine; continues for five days, always worse in forenoon (second day).


Urinates often and of smaller quantity (third day).

Passes urine often and in small quantities (second day). Passed much smaller quantity of urine, but often, every two hours; had to rise in the night, to urinate (fourth day). Frequent passing of small quantities of light-colored urine (third day). Urine frequent and scanty, with flocculent sediment and strong pungent smell. Scanty urine (fifth day). Urine scanty and light-colored (second day). Urine scanty, and greasy pellicle on it (second day). Scanty urine which after standing has a greasy pellicle on it (second day). Less urine, and more saturated.


Urine more yellow (fourth day). Urine deep red, with flocculent red sediment after standing (second day). Greasy pellicle on the urine (seventh and eighth days); with yellow flocculent sediment (ninth day). Sediment of yellow-red flocks in the urine, which are in little clots after two hours standing (third day).

Sexual Organs.

Impotence and emissions without erections. Severe pain in the right testicle, continuing a few moments; better after passing urine, 10 A.M., three hours after second dose (second day). More sexual desire in the morning. Emissions with partial erections during sleep (fourth day). Emissions without erections (eighth and ninth days). During a nap in the evening, lying on his back on the sofa, seminal emission, with a dream unusually particular and vivid; in a married man of 50 years (first day). Awoke at 4 A.M. with pollution (second day). Seminal emissions at night, with headache.

Respiratory Organs.


Stitching pain in the larynx, in the front region, forenoon (first day). The pain in the larynx returned at 9.30 A.M., with a warm sensation through the whole body, and with flushes of heat and much perspiration, forenoon (second day).

Cough and Expectoration.

Coughing, with soreness of throat and rawness when hawking (seventh and eighth days). Short hacking cough, with frequent expectoration of a quantity of red blood, which, from the sensation felt, comes from the larynx (fourth day).

Expectoration of thick tough mucus, mixed with blood; scratching sensation in the throat, feeling also as if something had lodged in the throat, inducing swallowing, morning (third day). Copious expectoration of frothy white mucus with lumps in it, about 9 A.M. (fourth day). Profuse expectoration, in morning, of white mucus, with little bubbles of air in it, worse in open air (fifth and tenth days). Several mornings in succession, raising of much thick tough mucus, mixed with a considerable quantity of red blood, with a sensation of fullness and pressive pain in the larynx, accompanied by a sensation of scratching and rawness, with occasional burning pains and a disposition to keep the jaws closed tightly; the above sensations are increased by pressure, empty deglutition, and cold water (fourth and following days).

Hawking and spitting of much thick white mucus (third day).


Frequent sighing.


Occasional deep stitches in the lower part of the chest, mostly on the left side, on taking a deep inspiration (third day).


Pain in back, on sitting down after rising (second day).

Backache, as if he could not straighten himself (seventh day).

Backache, worse all morning (seventh day). Backache, with seminal emissions. Pain in the back, increasing while sitting (similar to Zincum). Pain in the back while sitting, better on walking or lying down.


An indefinite pain on either side of the dorsal spine, similar to that felt in the chest, when it is said “the food has lodged” (third day). Pain between shoulders, in lumbar region, and small of back (second day).


Pain in small of back when sitting, going off when rising and walking, or lying down (second day). Severe pain in small of back, in evening (thirteenth day). Severe pain in small of back, with pain in head, at 6 P.M. (second day). Severe pain in small of back, after dinner, with aching pain in knees, and below (fourth day). Severe pain in small of back, worse when sitting (second day), better when lying down (third day). Severe pain in small of back, partially relieved by lying down, not by standing (after twenty-one hours and a half). Aching pain in small of back, felt most when sitting (second day). Pain in the small of the back, always while sitting.

Extremities in General.


Trembling of the limbs (fifth day). Trembling of the limbs, especially the legs (third day). Jerks in limbs, when falling asleep (after three hours). Weakness and weariness of the limbs.


Great weariness of the limbs, from walking.

Bruised pains in the limbs, especially in the joints; morning (third day). Bruised pain in all the limbs, afternoon (first day). Stitching pains, here and there, in the arms, legs, etc.

(third day).

Superior Extremities.

Aching pain in the wrist-joints, with occasional stitches (third day).

Inferior Extremities.

Tired feeling in legs (second day). Aching in both legs, half way between thighs and knees, on the front side (in muscles), (second day).


Bruised pain in the left hip, in the region of trochanter major, which was worse on motion, and better by rest, morning (third day).


Stitching shooting pain from the region of the liver down to the thigh, 3 P.M. (first day).


Weakness of knees, after exercise (fourth day). Weakness of knees after a little exercise (second day). Excessive weakness of the knees, as if they would not support him (second day).

Aching of knees and lower extremities (seventh day). Aching in knees, with itching of skin on the external side.

General Symptoms.


Weakness of body, especially the limbs, (second day).

Had to lie down (after nine hours). Restlessness, and go to sleep late.


A very remarkable feeling of being unusually well (first and following days). Languor, in evening, with aching of knees (fifth day). Languidness; disposition to lie down; flushes of heat along the legs (third day). Weak, weary feeling in the whole body, especially the limbs (second day). Soreness and bruised pain in the whole body; no disposition to move, morning (second day).

Aching when sitting (third day). Aching of the bones (second day).



Eruptions, Dry.

Pimples on back of left ear, near top (third day). Number of painless pimples on nose (second day). Pimples on shoulders, pit of stomach, and buttocks, which bleed easily when scratched.

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.