Mexico 1989.

Methods	'Randomised', no further information. 5 women excluded from chlorpromazine group because they received another antihypertensive. CFU ‐ B, blinding C.
Participants	60 women with severe PE or eclampsia. Excluded if cardiopathy, diabetes, isoimmunisation, twin pregnancy, or antihypertensive in 48 hr before trial entry.
Interventions	Chlorpromazine: 12.5 mg IV and 12.5 mg IM. 12.5 mg IV repeated every 30 min, to a total of 50 mg, until BP controlled or an additional antihypertensive. Nifedipine: 10 mg sl, repeated every 30 min to a max of 4 doses until BP controlled or an additional antihypertensive.
Outcomes	Woman: eclampsia, additional antihypertensive, caesarean section. Baby: gestation at delivery (mean).
Notes	All women received phenytoin.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	“The randomised assignment took place using permutation blocks and random number tables.”
Allocation concealment (selection bias)	Unclear risk	B ‐ Unclear. States “...the scheme for each patient in a sealed envelope identified with a number” ‐ but no information whether envelopes were sequentially numbered or opaque.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not reported, but regimens different.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not reported, but regimens different.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	60 women were randomised, but 5 women in the chlorpromazine group were excluded from the analysis as they received other medications, reducing this group to 25. Don't appear to present any data on these 5 women ‐ though this was from a translation.
Selective reporting (reporting bias)	Unclear risk	Unclear, article in Spanish and can not tell from translation.
Other bias	Unclear risk	Unclear, article in Spanish and can not tell from translation.