Prepared from a plant, Berberis Vulgaris or Barberry has its action on mostly all the regions of the body, but its action is most appreciated for all sorts of kidney, liver and urinary tract ailments.
 
Head
 
Pain in the forehead, vertigo with a tendency to faint. 
Pain near the ears.
Helps to treat vesicles on tongue , decreased saliva which is sticky and frothy
Frontal headache
Sensation of a tight cap pressing upon the whole scalp
 
Stomach
 
Good for those who feel nauseous before breakfast
Pain in region of gall bladder which is severe and increases when pressure is applied.
Excellent for piles and anal fistulas, loose motions are painless with pain and burning in anal region.
Pain in the kidney region that goes till the abdomen, feels constipated.
 
Urinary 
 
Has special effect on the urinary system
Pain in the thighs and sides of abdomen when goes to urinate
Urination is frequent with a lot of burning
Person feels some urine has still not passed
There is presence of red particles present in urine
 
Sexual organs
 
Periods have less flow with pain in kidneys and thighs. 
Pain in vagina with decreased sexual desire. 
Greyish vaginal discharge
 
Back and Extremities
 
Pain in back which increases on breathing.
Bones of the feet feel like they have been sprained.
Pain in the lumbar regions after any operations.
Rheumatism of all small and big joints like shoulder , arms , hands, legs and feet
Pains in heels and weakness of legs even after walking a small distance
 
Skin
 
Itching of skin , warts, eczema in hands and anal area. 
The eczema patches are circular which is worse on scratching and better by cold applications.
 
Dose- As prescribed by physician. Can be taken along with allopathic medicines.
 
Precautions
 
Maintain half an hour gap between food/drink/any other medicines and homeopathic medicine. 
Avoid any strong smell in the mouth while taking medicine e.g. camphor, garlic, onion, coffee, hing.
 

Use under medical supervision.