What is your preferred regimen for treating recalcitrant and recurrent macula-threatening ocular toxoplasmosis?

Treatment options for ocular toxoplasmosis include:

1. Trimethoprim/sulfamethoxazole (Bactrim)
2. Azithromycin
3. Pyrimethamine + sulfadiazine + folinic acid
4. Atovaquone
5. Oral clindamycin
6. Intravitreal clindamycin

I usually start with Bactrim DS PO BID. If a patient is sulfa allergic or pregnant, I start with a...