A stomachic medicine is one that serves to tone

Tonic (physiology)

Tonic in physiology refers to a physiological response which is slow, and may be graded. This term is typically used in opposition to a fast response...

 the stomach

Stomach

The stomach is a muscular, hollow, dilated part of the alimentary canal which functions as an important organ of the digestive tract in some animals, including vertebrates, echinoderms, insects , and molluscs. It is involved in the second phase of digestion, following mastication .The stomach is...

, improving its function and increasing appetite. While many herbal remedies

Herbalism

Herbalism is a traditional medicinal or folk medicine practice based on the use of plants and plant extracts. Herbalism is also known as botanical medicine, medical herbalism, herbal medicine, herbology, herblore, and phytotherapy...

 claim stomachic effects, modern pharmacology

Pharmacology

Pharmacology is the branch of medicine and biology concerned with the study of drug action. More specifically, it is the study of the interactions that occur between a living organism and chemicals that affect normal or abnormal biochemical function...

 does not have an equivalent term for this type of action.

Herbs with stomachic effects include:

• Agrimony
  Agrimony
  Agrimonia, commonly known as Agrimony, is a genus of 12-15 species of perennial herbaceous flowering plants in the family Rosaceae, native to the temperate regions of the Northern Hemisphere, with one species also in Africa...
  
  
• Anise
  Anise
  Anise , Pimpinella anisum, also called aniseed, is a flowering plant in the family Apiaceae native to the eastern Mediterranean region and Southwest Asia. Its flavor resembles that of liquorice, fennel, and tarragon.- Biology :...
  
  
• Barberry
• Cannabis
  Cannabis
  Cannabis is a genus of flowering plants that includes three putative species, Cannabis sativa, Cannabis indica, and Cannabis ruderalis. These three taxa are indigenous to Central Asia, and South Asia. Cannabis has long been used for fibre , for seed and seed oils, for medicinal purposes, and as a...
  
  
• Cleome
  Cleome
  Cleome is a genus of flowering plants in the family Cleomaceae. Previously it had been placed in family Capparaceae, until DNA studies found the Cleomaceae genera to be more closely related to Brassicaceae than Capparaceae...
  
  
• Centaurium
  Centaurium
  Centaurium is a genus of 20 species in the gentian family , tribe Chironieae, subtribe Chironiinae. The genus was named after the centaur Chiron, famed in Greek mythology for his skill in medicinal herbs...
  
  
• Cayenne
  Cayenne
  Cayenne is the capital of French Guiana, an overseas region and department of France located in South America. The city stands on a former island at the mouth of the Cayenne River on the Atlantic coast. The city's motto is "Ferit Aurum Industria" which means "Work brings wealth"...
  
  
• Dandelion
• Elecampane
  Elecampane
  Elecampane, also called Horse-heal or Marchalan , is a perennial composite plant common in many parts of Great Britain, and ranges throughout central and Southern Europe, and in Asia as far eastwards as the Himalayas....
  
  
• Ginseng
  Ginseng
  Ginseng is any one of eleven species of slow-growing perennial plants with fleshy roots, belonging to the genus Panax of the family Araliaceae....
  
  
• Goldenseal
  Goldenseal
  Goldenseal is a perennial herb in the buttercup family Ranunculaceae, native to southeastern Canada and the northeastern United States. It may be distinguished by its thick, yellow knotted rootstock. The stem is purplish and hairy above ground and yellow below ground where it connects to the...
  
  
• Grewia asiatica
  Grewia asiatica
  Grewia asiatica is a species of Grewia native to southern Asia from Pakistan east to Cambodia, and widely cultivated in other tropical countries. Grewia celtidifolia was initially considered a mere variety of Phalsa, but is now recognized as a distinct species.It is a shrub or small tree growing...
  
   (Phalsa or Falsa)
• Hops
  Hops
  Hops are the female flower clusters , of a hop species, Humulus lupulus. They are used primarily as a flavoring and stability agent in beer, to which they impart a bitter, tangy flavor, though hops are also used for various purposes in other beverages and herbal medicine...
  
  
• Holy thistle
• Juniper
  Juniper
  Junipers are coniferous plants in the genus Juniperus of the cypress family Cupressaceae. Depending on taxonomic viewpoint, there are between 50-67 species of juniper, widely distributed throughout the northern hemisphere, from the Arctic, south to tropical Africa in the Old World, and to the...
  
   berry
• Mugwort
• Oregano
  Oregano
  Oregano – scientifically named Origanum vulgare by Carolus Linnaeus – is a common species of Origanum, a genus of the mint family . It is native to warm-temperate western and southwestern Eurasia and the Mediterranean region.Oregano is a perennial herb, growing from 20–80 cm tall,...
  
  
• Peach
  Peach
  The peach tree is a deciduous tree growing to tall and 6 in. in diameter, belonging to the subfamily Prunoideae of the family Rosaceae. It bears an edible juicy fruit called a peach...
  
   Bark
• Rhubarb
  Rhubarb
  Rhubarb is a group of plants that belong to the genus Rheum in the family Polygonaceae. They are herbaceous perennial plants growing from short, thick rhizomes. They have large leaves that are somewhat triangular-shaped with long fleshy petioles...
  
  
• White mustard
  White Mustard
  White mustard is an annual plant of the family Brassicaceae. It is sometimes also referred to as Brassica alba or B. hirta...
  
   seeds
• Rose hip
  Rose hip
  The rose hip, or rose haw, is the fruit of the rose plant, that typically is red-to-orange, but ranges from dark purple to black in some species. Rose hips begin to form in spring, and ripen in late summer through autumn.-Usage:...
  
  s
• Rue
  Rue
  Rue is a genus of strongly scented evergreen subshrubs 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. There are perhaps 8 to 40 species in the genus...
  
  
• Wormwood
  Artemisia absinthium
  Artemisia absinthium is a species of wormwood, native to temperate regions of Eurasia and northern Africa....
  
  

The purported stomachic mechanism of action of these substances is to stimulate the appetite by increasing the gastric secretions of the stomach, although the actual therapeutic value of some of these compounds is dubious. Some other important agents used are:

• Bitters
  Bitters
  A bitters is an alcoholic beverage that is flavored with herbal essences and has a bitter or bittersweet flavor. There are numerous brands of bitters that were formerly marketed as patent medicines but are now considered to be digestifs, rather than medicines...
  
  : used to stimulate the taste buds, thus producing reflex secretion of gastric juices. Quassia
  Quassia
  Quassia is a flora genus in the family Simaroubaceae. Its size is disputed; some botanists treat it as consisting of only one species, Quassia amara from tropical South America, while others treat it in a wide circumscription as a pantropical genus containing up to 40 species of trees and shrubs....
  
  , aristolochia
  Aristolochia
  Aristolochia is a large plant genus with over 500 species. Collectively known as birthworts, pipevines or Dutchman's pipes, they are the namesake of the family . They are widespread and occur in the most diverse climates. Some species, like A. utriformis and A...
  
  , gentian
  Gentian
  Gentiana is a genus of flowering plants belonging to the Gentian family , tribe Gentianeae and monophyletic subtribe Gentianinae. With about 400 species, it is considered a large genus.-Habitat:...
  
  , and chirata are commonly used.
• Alcohol
  Alcohol
  In chemistry, an alcohol is an organic compound in which the hydroxy functional group is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms....
  
  : increases gastric secretion by direct action and also by the reflex stimulation of taste buds.
• Miscellaneous compounds: including insulin
  Insulin
  Insulin is a hormone central to regulating carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, muscle, and fat tissue to take up glucose from the blood, storing it as glycogen in the liver and muscle....
  
   which increases the gastric secretion by producing hypoglycemia
  Hypoglycemia
  Hypoglycemia or hypoglycæmia is the medical term for a state produced by a lower than normal level of blood glucose. The term literally means "under-sweet blood"...
  
  , and histamine
  Histamine
  Histamine is an organic nitrogen compound involved in local immune responses as well as regulating physiological function in the gut and acting as a neurotransmitter. Histamine triggers the inflammatory response. As part of an immune response to foreign pathogens, histamine is produced by...
  
  , which produces direct stimulation of gastric glands.