Last night I had the worst attack of endo yet. Ended with a paramedic and on call doctor by my bed at 2am. I was given entonox and a shot of tramadol. I had already taken maximum doses of ibrupohen throughout the day and then tramadol tablets but threw it up. I really feel I need something stronger. I'm also asthmatic. Can anyone suggest a good pain relief for flare ups like this please?