What Causes Sickness And Tiredness While On Phenoxymethylpenicillin For Tonsillitis?

Hi, may I answer your health queries right now ? Please tyHeya my names Sarah and I'm 23..Ive just been given the antibiotic phenoxymethylpenicillin for severe tonsilitus...Just wandering is normal to be a little sick and tired? Also I seem to be spitting out a flem like substance but it occurs in my mouth not in my throat?.....

Is this all normal help me out if you can please

Much appreciatedpe your query here...