However...
However, there is no harm in taking Daghistsan or Armenian clay as a medicine if there be no alternative. It is also permissible to take a small quantity of the clay of the Shrine of Imam Husayn (usually called Turbatul Husayn) for the purpose of cure for illness. But it is better to dissolve a small quantity of Turbatul Husayn in water and then drink it. Issue 2638: It is not haraam to swallow the mucus (liquid running from the nose) and phlegm which may have come in one's mouth.
Also, there is no objection in swallowing the food which comes out from between the teeth at the time of tooth picking. Issue 2639: It is haraam to eat an absolutely harmful thing, or anything which may cause death. Issue 2640: * It is Makrooh to eat the meat of a horse, a mule or a donkey. If a person has sexual intercourse with them those animals become haraam, and as a precaution, their offspring become haraam also, and their urine and dung become Najis.
Such animals should be taken out of the city and should be sold at some other place. And as for the person who committed the sexual intercourse with the animal, it will be necessary to give its price to the owner. Similarly, if a person commits sexual intercourse with an animal like cow and sheep, the meat of which it is lawful to eat, its urine and excrement become Najis, and it is also haraam to eat their meat, and to drink their milk.
As a precaution, same will be the case with their offsprings. Such an animal should be instantly killed and burnt, and one, who has had sexual intercourse with the animal should pay its price to its owner.
Issue 2641: * If the kid of a goat or a lamb sucks the milk of a female pig to such an extent that its flesh and bones grow from it and gain strength, itself and its offspring become haraam, and if the quantity of milk sucked by it is less, it will be necessary that it is confined (Istibra) as prescribed in Shariah and thereafter, it becomes halal. And its Istibra is that it should suck Clean (tahir/pak) milk for seven days, or if it does not need milk, it should graze grass for seven days.
As an obligatory precaution, this law applies to the calves, and all the young ones of halal animals. Also, it is haraam to eat the meat of an animal which eats najasat and it becomes halal when its Istibra is fulfilled. The manner of observing Istibra has been explained in rule 226.