high blood pressure
"I suffered for three years with bleeding and red spongy gums.  It got worse as time went on...even developed small painless ulcers.  Finally, after going to 5 different doctors, a periodontist told me to stop Amlodipine.  My gums are fine now.  Of course, I had to get periodontal work done to the tune of $1125, but by that point, I would have paid double to get to the bottom of it."