Get medical help right away if you have any very serious side effects, including: severe dizziness, fast/irregular heartbeat, fainting, seizures, eye pain/swelling/redness, widened pupils, vision changes (such as seeing rainbows around lights at night). Talk to your pharmacist for more details. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Use sunscreen and wear protective clothing when outdoors.