Typically, treatment for both gonorrhea and chlamydia is indicated, if one entity is suspected.

Standard
Gonorrhea
Ceftriaxone IM x 1
500 mg, if weight <150 kg
1 g, if weight ≥150 kg
Chlamydia
Nonpregnant: doxycycline 100 mg PO BID x 7 days
Pregnant: azithromycin 1 g PO x 1
Ceftriaxone IM x 1
500 mg, if weight <150 kg
1 g, if weight ≥150 kg
500 mg, if weight <150 kg
1 g, if weight ≥150 kg
Nonpregnant: doxycycline 100 mg PO BID x 7 days
Pregnant: azithromycin 1 g PO x 1
Ceftriaxone contraindicated
Gonorrhea
Gentamicin 240 mg IM x 1 PLUS azithromycin 2 g PO x 1, OR
Cefixime 800 mg PO x 1
Chlamydia^
Nonpregnant: doxycycline 100 mg PO BID x 7 days
Pregnant: azithromycin 1 g PO x 1
Gentamicin 240 mg IM x 1 PLUS azithromycin 2 g PO x 1, OR
Cefixime 800 mg PO x 1
Nonpregnant: doxycycline 100 mg PO BID x 7 days
Pregnant: azithromycin 1 g PO x 1
^Additional chlamydia coverage only needed if treated with cefixime only
Gonorrhea
Cefixime 800mg PO x 1
Chlamydia
Nonpregnant: doxycycline 100mg PO BID x 7 days, OR
Pregnant: azithromycin 1g PO x 1
Cefixime 800mg PO x 1
Nonpregnant: doxycycline 100mg PO BID x 7 days, OR
Pregnant: azithromycin 1g PO x 1
Metronidazole 500mg PO BID for 7 days 
Tinidazole 2g PO once
Only treat if the patient is symptomatic and avoid breast feeding until 24-hrs after last dose
Metronidazole 2g PO once
Metronidazole 500mg PO BID x 7 days OR
Tinidazole 2g PO once
Metronidazole 2 gm PO x1
OB/GYN antibiotics
GU antibiotics
Pediatric antibiotics
Sepsis antibiotics
Neuro antibiotics
Antibiotics 
Skin and soft tissue antibiotics
GI antibiotics