I was prescribed erythromycin yesterday. 2 tablets to be taken 4 times a day. I've had 10. I have been violently ill since about noon today. And I mean constant nausea, vomiting profusely (literally just liquid bile).
I have stopped taking them (last ones were taken this morning).
I rang GP surgery at 3pm to speak to a GP but they had all gone home 
Is there anything I can do to stop the nausea? Or do I have to wait for it to come out of my system? The leaflet lists it as a side effect 'feeling sick or being sick', but it only says to report the side effect, not what the fuck to do about it.
I'm already on lansoprazole for my stomach. Would taking one of them help? I can honestly say, I've rarely been so violently ill in my life.
Bastard things. I feel like I've been poisoned. 
Not sure if it's relevant, but I'm allergic to penicillin?