( ( In general ) ( , ( phenothiazines ( ( block ( ( the ( dopamine receptors ) ) ( in ( the brain ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN general))) (, ,) (NP (NNS phenothiazines)) (VP (VBP block) (NP (NP (DT the) (JJ dopamine) (NNS receptors)) (PP (IN in) (NP (DT the) (NN brain))))) (. .)))
In general, phenothiazines block the dopamine receptors in the brain.
(ROOT (S (NP (NNP Addiction)) (VP (VBZ affects) (NP (NP (DT the) (JJ dopamine) (NNS receptors)) (PP (IN within) (NP (DT the) (NN brain))))) (. .)))