Is it permissible to use a medication to treat depression, given a doubt concerning forbidden ingredients within it, knowing that treating oneself with forbidden things is not permissible?

Seeking medical treatment is permissible, and Allah has not sent down a disease without also sending down its cure, except for old age. The Prophet, peace and blessings be upon him, and his companions sought medical treatment. Therefore, there is no harm in seeking treatment from a doctor and using medicine, as long as it is not known to contain anything forbidden. The default rule for things is permissibility. It is recommended to repent, frequently seek Allah's forgiveness, perform righteous deeds, strengthen one's faith, submit to Allah's divine decree and destiny, entrust all affairs to Him, recite the Qur'an, remember Allah, send blessings upon His Messenger, and frequently turn to Allah for refuge.