The side effects associated with antihistamines are multiple choice hypertension and urinary incontinence sedation and xerostomia agitation and insomnia narcolepsy and bradycardia

Sedation and xerostomia are the side effects of antihistamines

Explanation:

Taking antihistamines make a person feel sleepy or experiencing drowsiness or sedation. It is advised not to drive cars when you having this medication because it decreases your response rate to the stimuli in your surroundings. Another side effects of using antihistamine is the feeling of dry mouth also known as xerostomia which is characterize by hypofunction of salivary glands thus producing decreased salivary flow.  

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affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.