The first H1 - receptor antagonists became commercially available in the 1940s and were widely prescribed subsequently.
第一代H_1受体拮抗剂自19世纪进入市场以来，得到了广泛的应用；
The first H1 - receptor antagonists became commercially available in the 1940s and were widely prescribed subsequently.
第一代H_1受体拮抗剂自19世纪进入市场以来，得到了广泛的应用；
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