Patients with angle closure or narrow angle types of glaucoma should seek advice before taking some types of tranquilliser or certain asthma and indigestion medicines. However, these are usually safe if you have had laser treatment (iridotomy) or surgery (peripheral iridectomy).Steroid (cortisone-type) drops and tablets should be used with caution because they can increase the pressure in the eye. If you have had a glaucoma operation, steroid drops or tablets are safer. Some other tablets may interact with glaucoma treatments. Always mention to your doctor that you are having glaucoma treatment and your doctor will advise you