Why should not medicines be taken without consulting doctors? "

A doctor advised a pregnant lady not to take any medicines without consulting him especially for the first three months. Give reason.

Sleeping pills are recommended by doctors' to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor. Why?

One of your classmate is suspected to be having typhoid and you advise him to consult a doctor and to do the confirmation test.Name the medical confirmation test.

A box contains same size of 27 cards: Of these some are green and some are yellow A card is taken from the box, without looking into ịt, if the probability of the card become green is 1/3 a) What is the number of green cards? b) If a green card and 2 yellow cards are put in the box and a card is taken without looking into it What is the probability of it being green?

A person with a swelling in the thyroid gland consults a doctor. a) What type of disease does this person have? b) As a student of biology, what remedy would you suggest for these?