( ( If ( ( these receptors ) ( ( are not ) blocked ) ) ) ( , ( ( the addict ) ( ( ( is adversely ) affected ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT these) (NNS receptors)) (VP (VBP are) (RB not) (VP (VBN blocked))))) (, ,) (NP (DT the) (NN addict)) (VP (VBZ is) (ADVP (RB adversely)) (VP (VBN affected))) (. .)))
If these receptors are not blocked, the addict is adversely affected.
(ROOT (S (NP (NNP Addiction)) (VP (VBZ affects) (NP (NP (DT the) (JJ dopamine) (NNS receptors)) (PP (IN within) (NP (DT the) (NN brain))))) (. .)))