Can taking blood thiner loosen teeth?

It could be: Some blood thinner except Aspirin could lead to vit d deficiency and bone thinning .. Teeth are surrounded by thin bone . So there is a chance of something like that to happen . But also it depends on the health of teeth and the surrounding gum and periodontal tissue

Medications: For "thinning the blood" have no direct correlation to loosening teeth. Loose teeth are related to disease that affects the bone and gums that support the teeth and to trauma. See your dentist or a periodontal specialist very soon to get to the source of the problem and get treatment. Good luck!