Anti-epileptic drugs like phenytoin can cause severe gingival (gum) enlargement.
Source: Lucchesi J et al, Severe Phenytoin-Induced Gingival Enlargement Associated with Periodontitis, March 2008, Vol 56, No 2, pg 199-203.
Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group in Mississauga
2233 Hurontario St., Mississauga, ON, Canada
(1/2 km north of the QEW in the Dome Building)