LAMISOPT PLUS can affect or be affected by other medicines the patient is using, including other eye drops for the treatment of glaucoma. Tell the doctor if the patient is using or intends to use medicines to lower blood pressure, heart medicine or medicines to treat diabetes. Tell the doctor or pharmacist if the patient is taking, has recently taken or might take any other medicines. This is particularly important if the patient is: taking medicine to lower blood pressure or to treat heart disease (such as calcium channel blockers, beta-blockers or digoxin); taking medicines to treat a disturbed or irregular heartbeat such as calcium channel blockers, beta-blockers or digoxin; using another eyedrop that contains a beta-blocker; taking another carbonic anhydrase inhibitor such as acetazolamide; taking monoamine oxidase inhibitors (MAOIs) which are used to treat depression; taking a parasympathomimetic medicine which may have been prescribed to help the patient pass urine. Parasympathomimetics are also a particular type of medicine which is sometimes used to help restore normal movements through the bowel; taking narcotics such as morphine used to treat moderate to severe pain; taking medicines to treat diabetes; taking antidepressants known as fluoxetine and paroxetine; taking a sulfa medicine; taking quinidine (used to treat heart conditions and some types of malaria).