“…Liver toxicity was considered to be due to sulfadiazine alone, summative drug toxicity or a combination of drug toxicity and hepatitis B infection. Pyrimethamine-clindamycin + primaquine was the preferred regime In moderate to severe PCP, a randomised controlled comparison between intravenous co-trimoxazole 90 to 120 mg/kg/ day and pentamidine 4 mg/kg/day for 17 to 21 days demonstrated better survival rate in the co-trimoxazole arm according to Sattler et al 2 A multi-centre three-arm randomized trial in mild to moderately severe PCP reported similar two-month survival rates for trimethoprim (15 mg/ kg/day)-dapsone (100 mg/day), clindamycin 600 mg three times daily-primaquine 30 mg/day and co-trimoxazole (55-85 mg/kg/day) according to Safrin et al 3 There was no difference in proportions of patients with each therapy that had doselimiting toxicity or failure of therapy. A multi-centre, randomized comparison of atovaquone 750 mg three times daily with co-trimoxazole 1,920 mg three times daily in mild to moderately severe PCP, showed lower response rates, higher death rates attributed to PCP in the atovaquone arm, but more adverse effects requiring change of therapy in the co-trimoxazole arm, reported by Hughes et al 4 Treatment of Toxoplasma encephalitis in isolation is has also been well-studied.…”