please provide references for each answer. thank

please provide references for each answer. thank you 1) Mrs Evans has been prescribed a course of Amoxicillin (a broad-spectrum antibiotic) for a UTI. 48 hours following the screening results, the Dr has changed Mrs Evans’ medication to a new antibiotic regime. Outline two rationales for the change. 2) Describe three subjective and objective observations a patient would report, that indicates the effectiveness of pain relief management. 3) Identify two methods salbutamol can be administered via the respiratory tract 4) describe how enoxaparin is packaged and identify 1 rationale for withholding GTN medication.

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