Tolerance to Bromocriptine may be reduced by alcohol. Concomitant use of Bromocriptine and other ergot alkaloids during is not recommended. The concomitant use of erythromycin and other macrolide antibiotics may increase Bromocriptine plasma levels. The concurrent use of bromocriptine and octreotide led to increased plasma levels of Bromocriptine. Phenothiazines, metoclopramide, butyrophenones and thioxanthenes may reduce the prolactin-lowering and antiparkinsonian effects of Bromocriptine.