It's possible, but rare, to pass chlamydia to the throat through an act of oral sex with an infected man. Symptoms usually show up one to three weeks after infection, if they appear at all.
Although a 1998 study by Hammerschlag and coworkers found oral azithromycin to be an effective alternative to erythromycin in either 20 mg/kg as a single dose or 20 mg/kg once daily for three days ...