Yesterday morning (at 7.45an) I had a call from my GP to say I shouldn't have azythromycin whilst taking citalopram as it can affect the heart. He did explain in detail and you can find it on the web. He wrote out a prescription for another antibiotic - luckily it is only for emergencies. I had azythromycin in October and there was no mention then. I have an appointment to see him in early January. I will also email my consultant about it. Luckily I nebulise colomycin every day which is ok.