Der er mulighed for yderligere virkninger i form af hypotension og/ eller markant bradykardi, når øjendråber med timolol indgives samtidigt med oralt indgivne kalciumkanalblokkere, guanethidin eller betablokkere, antiarytmika, digitalisglycosider eller parasympatomimetika.
There is a potential for additive effects results in hypotension and/ or marked bradycardia when eye drops with timolol are administered concomitantly with oral calcium channel blockers, guanethidine or beta-blocking agents, antiarrhythmics, digitalis glycosides or parasympathomimetics.