Hi there, I suffer with chronic hemiplegic migraine and cluster headaches. I am on various preventer drugs but a few weeks ago started lithium at 400mgs for cluster prevention. When I next injected sumatriptan I had massive chest pain, difficulty breathing, standing and low blood pressure. I had to be taken to A&E till I stabilised. Has anyone else found this with the two together and do they know if there is an abortive alternative? Many thanks.