然而，慢性偏头痛与普通型偏头痛及紧张性头痛不一样。
Chronic migraine differs from ordinary migraines and tension headaches, however.
目的：观察文拉法辛胶囊治疗慢性紧张型头痛的有效性及安全性。
AIM: To observe the efficacy and safety of venlafaxine capsules in the treatment of the chronic tension-type headache.
目的：观察文拉法辛胶囊治疗慢性紧张型头痛的有效性及安全性。
AIM: To observe the efficacy and safety of venlafaxine capsules in the treatment of the chronic tension-type headache.
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