In Tibetan medicine, each person is born with a La or "soul." (Perhaps soul is not the best translation since, in Buddhism, a central tenet is that there is no atman or soul.) This concept corresponds to what in Chinese medicine is referred to as the Hun, also usually translated as soul. The La and Hun both have a huge impact on a person's health. When they are healthy and reside properly within the body, the person is healthy and, if they do hapen to get sick, they stand a good chance of recuperating. However, the La/Hun tends to roam outside the body during sleep. It can also be "stolen" or "damaged" by spirits, it may get "lost," and it may also deteriorate or decline. When one's La/Hun is damaged or abstracted, the person cannot recuperate even when the correct medical treatment is given. They will also tend to be depressed, listless, apathetic, and easily distracted. Hence, within Tibetan Buddhism and medicine, there specific practices to "hook" back the La/Hun and restore it to its proper place and health within the body. However, within Tibetan Buddhism, these are Tantric or Vajrayana practices which typically require the trio of empowerment, oral transmission, and commentary as well as a certain amount of intense personal practice on the part of the practitioner before attempting to use them on another person. Some of these Tantric practices are based on the female Deity, Marichi (Ozer Chenma in Tibetan). Marichi's function is to dispel hindrances in general. However, She is also tasked more specifically with hooking back the La/Hun.
Below is a translation of Marichi's dharani from the Zung Du (Collection of Dharani) which does not require empowerment or oral transmission. Therefore, practitioners and patients alike without such empowerment and oral transmission can read and recite this dharani if and when they think their La/Hun has been lost, stolen, or damaged. If one sees that this recitation is having some good effect, then the patient may be encouraged to seek out a Tibetan Buddhist Lama or practitioner who can actually perform the ceremony called "Hooking the La" for them. Meantime, try to read this dharani at least once per day.
Arya Marichi Dharani
Gya-gar ked-du: Arya Marichi Nama Dharani
Bod ked-du: Phag-ma Od-zer Chen Zhe-ja-wai Zung
I prostrate to all the Buddhas and Bodhisatvas.
Thus I have heard:
Once the Blessed One was dwelling at Shravasti in the Jetavana Grove, the contemplative garden of Ananthapindada, together with a great gathering of 1250 monks and many Bodhisatva Mahasatvas in one skillful device. Then the Blessed One spoke these words to those monks:
"Oh monks, there is a holy Goddess named Marichi Who dwells near the sun and moon and is drawn forward by them. She is incomparable, unseizable, unbindable, unstoppable, unassailable, unobscurable, unpunishable, unable to be decapitated, indestructible, free from being burned, and unconquerable by enemies.
"Oh monks, whoever merely knows Marichi's name, such a person also becomes incomparable, unseizable, unbindable, unstoppable, unassailable, unobscurable, unpunishable, unable to be decapitated, indestructible, free from being burned, and unconquerable by enemies.
"In the same way, because you also know Marichi's name, may you too become incomparable, unseizable, unbindable, unstoppable, unassailable, unobscurable, unpunishable, unable to be decapitated, indestructible, free from being burned, and unconquerable by enemies.
"For this, the words of [Her] secret mantra are these:
OM PA-TA-TRA MA-SI
MA-HA TSII-BA-RA MA-SI
AN-TAR DHAM-NA MA-SI SO-HA
Goddess Marichi, protect me when I am on the road.
Protect me from wrong paths.
Protect me from the fear of [other] beings.
Protect me from the fear of kings.
Protect me from the fear of elephants.
Protect me from the fear of robbers.
Protect me from the fear of Nagas.
Protect me from the fear of lions.
Protect me from the fear of tigers.
Protect me from the fear of fire.
Protect me from the fear of water.
Protect me from the fear of snakes.
Protect me from the fear of poisons.
Protect me from all adversaries and enemies.
Protect me from all lions, whether disturbed or undisturbed, hurt or unhurt.
Protect me from tigers.
Protect me from Nagas.
Protect me from snakes.
Protect me, protect me from all fear [due to] harm, epidemics, turmoil, and warfare!
"NA-MO RAT-NA TRA-YA-YA
OM A-LO TA-LO KA-LO SAT-TSA-LO
RAK-SHA RAK-SHA MAM
"Protect me and all sentient beings from all harm, fears, and diseases SO-HA.
"I prostrate to the Three Jewels.
"The heart[-essence] of Goddess Marichi is thus proclaimed:
BAN-DHA BAN-DHA MU-KHAM
DZAM-BA-YA TAM-BA-YA MO-HA SO-HA
OM MA-RI-DZE-YE SO-HA
TSAK-SHUR MU-KHAM BAN-DHA BAN-DHA SO-HA"
When the Blessed One had said this, those monks and Bodhisatvas along with their retinues as well as the world with its Gods, humans, Asuras, and Gandharvas rejoiced [and] praised the words spoken by the Blessed One.
[Thus] the Arya Marichi Dharani is completed.