Mercury Mahadasha Effects and Remedies

In Mercury Dasa-bhukti, the native becomes efficient due to education and discriminative faculty. The native engages himself in agricultural pursuits, performs religious activities like yajna, and becomes wealthy. The native involves himself in industries and trades, especially in artisan works. In Mercury Dasa, the native shows interest in music, singing vocal ability, and clown acts). The native becomes polite as politeness is characteristic of education. There is a saying: 

विद्या ददाति विनयं, विनयाद्याति पात्रता। 

पात्रत्वाद्धनमाप्नोति धनाद्धर्मम् ततः सुखम्।

Learning gives virtue; virtue develops a capability, capability brings money, money makes piety. All these things bring happiness in life. In Mercury Dasa, the native likes the association of preachers, religious scholars, and gentle people, consumes fresh cereals, attains fame, gets ornaments, and builds new houses. Mercury bestows happiness from wife and progeny. In its Dasa, a weak and afflicted Mercury causes loss of wealth and gives diseases due to phlegm, wind, and bile, the human physical system's three disorders.

Bhuktis in Mercury-Dasa 

Mercury-Mercury in angles, trines, in own sign, in exaltation from the Lagna indicates inclination of the native in religious pursuits, increase of knowledge, fame and happiness education success in competition. Mercury weak, afflicted in 6th, 8th, or 12th from Lagna indicates multiple troubles, transfers, and loses opposition from relatives, intestinal disorder, and headache.

Mercury-Ketu Dasha: Ketu conjunct benefits, lords of trines in trines or angles or 11th house from the Lagna or Mercury denotes happiness, fame, knowledge, health and wealth, and the realization of god and religious enlightenment. Ketu bhukti is usually inconducive. Ketu is not suitable for the acquisition of wealth if in the 2nd house. 

Mercury-Venus Dasha: Venus in angles, trines, own sign, in exaltation. 11th house from the Lagna or Mercury denotes gain of land wealth, ornaments, costly clothes, and luxuries. The native is philanthropic and donates to charities. Association with beautiful women and benefits from that place, Venus weak, afflicted, in 6th 8th or 12th from Lagna or Mercury denotes loss of a wife, heart diseases. Sexual ailments, dysentery, indiscriminate expenses, veins conditions, water retention in tissues, and urinary complaints. Venus afflicted as maraka in 2nd of 7th house signifies unnatural death such as a death in sex scandals, kidney troubles, or incurable sex disease. 

Mercury-Sun Dasha: The Sun dignified, in angles, trines or 11th house from the Lagna or Mercury denotes a rise to high position due to academic ability, honor in king's court due to vocal ability, gains of land and estates, health, wealth, and prosperity. The afflicted, weak, in 6th, 8th, or 12th from the Lagna or Mercury signifies the excess of bile in the body, headaches, eye affections, heart ailments, high fever, danger from fire, etc. The Sun in 2 or 7th gives maraka results. 

Mercury-Moon Dasha: The Moon dignified, with bright rays in angles, trines, or 11th house from the Lagna or Mercury signifies luxurious living, ornaments, costly dresses, health, wealth, and happiness pilgrim gains from maternal uncles, frequent journeys gains from articles about sea like pearls. The native me wealthy by shipping. The Moon, afflicted, weak in 6th, 8th, or  12th from the Lagna or Mercury denotes emotional disturbance leprosy, thyroid problem, phthisis, fistula, etc. A business partner deceives the native. There may be a loss of appetite and illness to the wife. The Moon afflicted in 2nd or 7th brings on death due to dropsy, suicide, or emotional shock. 

Mercury-Mars Dasha: Mars in angles, trines or 11th house and dignified com the Lagna or Mercury denotes lands, health, wealth and prosperity. The native may set up new industry or business, courageous acts, success in litigation, gains from literary ability, and profits from law practice. Mars weak, afflicted in 6th, 8th, or 12th from the Lagna or Mercury denotes respiratory troubles, asthma, bilious affections, acute diseases, losses in land sale purchase, litigations involving lands, losses by theft, danger from enemies, own brothers may become bitter enemies. Mars afflicted in 2nd or 7th house denotes severe illness and death from acute infections, blood poisoning, hurt by weapon or fire, etc. 

Mercury-Rahu Dasha: Rahu in trines, angles, or 11th house indicates honor, wealth, pilgrimage, prosperity, gains from the people of other religion, the native may attain a royal position by diplomatic ability, improvements by current trends in business. Rahu afflicted in 6th, 8th or 12th denotes typhoid like complaints, worms in the stomach, apprehension, food poisoning, snake bite, fear from reptiles, danger from low caste people, diseases of undiagnosable character. Rahu afflicted in 2nd, or 7th denotes death under mysterious conditions. The native may become a victim of the well-laid trap. 

Mercury-Jupiter Dasha: Jupiter in angles, trines, own sign, in exaltation, in the from the Lagna or Mercury denotes, association with learned, religious and wealthy people, wealth and prosperity, acts of charities, expansion of business and trade, success in undertakings gains in the publishing business, departmental stores, etc. Jupiter afflicted, weak, in 6th, 8th, or 12th house from the Lagna or Mercury denotes ill health, liver complaints, quarrels with superiors, discredit, and misfortune ancestors' curse, loss of wealth, position, and transfer if in service. In the second or seventh, Jupiter is a strong maraka. It almost kills the native if the span of life ends in this bhukti. 

Mercury-Saturn Dasha: Saturn dignified, in angles, trines, or in 11th house from the Lagna or Mercury denotes happiness in family prosperity favors from superiors promotions leadership of labor classes, gains from the printing business, gains in agricultural pursuits, etc. Saturn weak, afflicted in 6th, 8th, or 12th denotes harassment from enemies, troubles to wife and children, rheumatic ailments affections of bones, bad dreams, etc. Saturn in 2nd or 7th indicates death by diseases.

You can read more about effects of the Mercury in different houses, impact of the Mercury transit on different signs and astrology remedies to please planets.