This is classified as primary, secondary, and early latent syphilis less than one year.
Treatment Options:
Penicillin G Benzathine 2.4 million units IM x 1
Repeat dose after 7 days for pregnant patients and HIV infection
Doxycycline 100mg oral twice daily for 14 days as alternative
Repeat dose after 7 days for pregnant patients and HIV infection
Late stage is greater than one year duration, presence of gummas, or cardiovascular disease
Treatment Options:
Penicillin G Benzathine 2.4 million units IM weekly x 3 weeks
Doxycycline 100mg oral twice daily for 4 weeks as alternative
There are 3 Major options with none showing greater efficacy than others:
Penicillin G 3-4 million units IV every 4 hours x 10-14 days
Penicillin G 24 million units continuous IV infusion x 10-14 days
Penicillin G Procaine2.4 million units IM daily + probenecid 500mg oral every 6 hours for 10-14 days.
Alternative:
Ceftriaxone 2gm  IV once daily for 10-14 days
Ceftriaxone 2gm  IV once daily for 10-14 days
Desensitization to the penicillin allergy is still the preferred method of treatment for patients with early and late stage disease (especially during pregnancy)
Penicillin, dosage depends on stage
OB/GYN antibiotics
GU antibiotics
Pediatric antibiotics
Sepsis antibiotics
Neuro antibiotics
Antibiotics 
Skin and soft tissue antibiotics
GI antibiotics