Is there any known interaction with cephalexin (500mg) and colcrys (.6mg). Just had an ICD implant 1/6/2016. Received intravenous doses of antibiotic in hospital. Took one colcrys am 1/7/16. Discharged 1/7/2016 about 9:30 am. At 3 pm took tablet cephalexin and a colcrys within a 1/2 hour of each other. Subsequently feeling a little constricted in my throat. Feels almost like the beginning of a sore throat. There is radiating soreness from incision which may or may not explain what I am experiencing. The other thought is am I experiencing an adverse reaction to the antibiotic itself. Please advise.