不过，在我们确切地了解雷公藤提取物有效而且安全之前，还需要进行更多的研究。
But more research needs to be done before we know for certain that TwHF extract works and is safe.
因此，尽管对雷公藤提取物的研究结果相当乐观，我们还需要更大规模的研究来加以确定。
So although the study's findings on TwHF extract were quite positive, we need larger studies to confirm them.
研究人员发现，服用雷公藤提取物的患者与服用硫氮磺胺吡啶的患者相比较，其疼痛、肿胀及其它症状有更明显的好转。
The researchers found that people who took TwHF extract had greater improvement in their pain, swelling, and other symptoms than those who took sulfasalazine.
本发明涉及一种雷公藤粗提取物的制备方法。
The present invention is the preparation process of tripterygium extractive.
方法雷公藤根或茎的水或乙醇提取物入药制备成涂膜剂，采用大鼠完全佐剂性关节炎模型，观察不同药物组对原发性肿胀和继发性肿胀的影响。
Methods The crude drugs of root or stem of Tripterygium wilfordii Hook. were extracted by water or ethanol. The film-forming preparations were made of different extractives.
方法雷公藤根或茎的水或乙醇提取物入药制备成涂膜剂，采用大鼠完全佐剂性关节炎模型，观察不同药物组对原发性肿胀和继发性肿胀的影响。
Methods The crude drugs of root or stem of Tripterygium wilfordii Hook. were extracted by water or ethanol. The film-forming preparations were made of different extractives.
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