Dry mouth-Antihistamines are know to decrease saliva leaving your mouth prone to inflamed, painful gums making them susceptible to infection.  Decrease in saliva can cause an increase in tooth decay.  Denture wears can develop sores.

Aspirin Damage
People who often chew aspirin over a prolonged period could severely damage their teeth.
The first case focused on a 52-year-old woman  that had been taking four to eight aspirin tablets a day for one to two years to relieve headaches. She typically held the aspirin tablets on the tooth surfaces and crushed them until they dissolved causing the tooth surfaces that most often came in contact with aspirin to eroded the most. A 42-year-old male patient stated that he had used aspirin or acetaminophen daily. He took an average of six aspirin a day. He put the aspirin in his mouth on his right posterior teeth and crushed them.  When we showed the tooth destruction to the patient, he confirmed that the worst areas were, indeed, where he held the aspirin tablets. Journal of the American Dental Association (JADA)7/04

Soft-tissue reactions-Medications for blood pressure control, immunosuppressive agents, oral contraceptives and chemotherapeutic agents can cause oral sores, inflammation and discoloration of gum tissue.

Abnormal bleeding-Aspirin, anticogulants, like warfarin and heparin can cause bleeding and blood clotting problems during oral surgery or periodontal treatment .

Coumadin-is a blood thinner that works by interfering with the liver's production of vitamin K dependent blood clotting factors. When you take a blood thinner, there are concerns that you may bleed unusually heavily after an extraction or having your teeth cleaned.  It is important that your doctor’s office contact us with a recent INR result before you have a cleaning, root planing, or any kind of dental surgery including extraction or gum surgery.  The INR result helps decide whether we can do the procedure with a high level of safety.    We can’t stress enough that our office must have good communication  with your doctor to insure the greatest safety for you. Doctors relay on a blood test called Prothrombin Time to know if levels are too high or low.  Normal PT reading if 1.0 which is equivalent to 10-12 seconds.  People on coumadin generally have 2.0 or twice the normal reading.  When PT number increases, there is a greater risk of increased bleeding.  PT times between 1.5-1.8 or less are safe readings for a person to have dental surgery.  Due to taking coumadin you may need additional measures to stop the bleeding from dental surgery like packing and stitching of the socket.  

Gum tissue overgrowth-This is know as gingival hyperplasia.  It is associated with anti-seizure medication, medications for organ transplants and calcium channel blockers. This condition makes good oral hygiene care difficult.

Tooth discoloration-Tetracycline products used when teeth are developing can cause permanent staining in teeth.