Most important part first
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All hospitals have a 24/7 nurse advice line. Give them a ring, they'll have YOU do some additional tests, ask you a bunch of questions/ get all her symptoms (including things you might not think to look for) and then tell you whether to
a) Continue treating at home (and with what meds at what dose per her weight and timing)
b) Make a doctor's appt in the morning
c) Come into the ER.
Don't trust US. Call up a medical professional on shift who can talk to you for a good 10-20 mintues and give you sound medical advice specific to your case
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Editorializing:
In GENERAL, you can take tylenol and ibuprofen daily for YEARS. You just need to get your liver checked every 6-12 months.
The fever isn't scaring me, right now, since it seems pretty responsive. It's spiking up to 103 & 104, but you bring it right back down to 99-100 with only ONE medicine (alternating, she only ever has 1 med in her system at a time). Tylenol and ibuprofen you can give at the SAME time for high or stubborn fevers. EX) 103.7 + tyelnol = 103.1 15 minutes later + ibuprofen = 102.
When it gets scary is when you give tylenol + ibuprofen and the fever DOESN'T come down.
((BUT I'M NOT THERE. I'm just reading your charting, have no idea of her medical history, or other symptoms. FEVER ALONE, I'm not "OMG", but -again- I'm not there, and I'm not triaging. Just commenting on general fevers. Yours is spiking up there, but seems really responsive to meds.))
5 days isn't that long, but it warrants a call to the doctor.
WHENEVER you need on the spot medical advice, or want to double check that you're "doing what I should be doing" call that 24/7 nurse line. I'm medically trained. I call ALL the time.