First generation Hj-antagonist

Common Adverse Effects The most frequent side effect in the first-generation Hj antagonists is sedation. Although sedation may be a desirable adjunct in the treatment of some patients, it may interfere with the patient s daytime activities. Concurrent ingestion of alcohol or other CNS depressants produces an additive effect that impairs motor skills. Other untoward central actions include dizziness, tinnitus, lassitude, incoordination, fatigue, blurred vision, diplopia, euphoria, nervousness, insomnia, and tremors. 

It is an ethanolamine antihistaminic agent belonging to the first-generation Hj-antagonist... 

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