AIM: To evaluate the effectivity of the combination of intracameral moxifloxacin 0.1% with subconjunctival triamcinolone acetonide 4 mg as prophylaxis of infection and inflammation after phacoemulsification in comparison with topical medication treated group. METHODS: A total one thousand patients with age range from 38 to 70 years old who scheduled for phacoemulsification were divided into 2 groups of no statistically significant differences in age, preoperative intraocular pressure (IOP) and central macular thickness (CMT), P=0.6, 0.9 and 0.8 respectively. The surgeries were done by 2 surgeons each one planned to use one method of prophylaxis at Eye Speciality Private hospital, Baghdad, Iraq. For the 1st group of patients (500) a topical moxifloxacin hydrochloride 0.5% and dexamethasone 0.1% eye drops were prescribed four times a day for 1mo postoperatively. For the 2nd group intracameral (IC) diluted moxifloxacin at 0.1% with subconjunctival (SC) triamcinolone 4mg in 0.4 cc were administered at the conclusion of the surgery. Follow up visits were on the first postoperative day, 1wk, 1mo, and 3mo postoperatively. Anterior chamber (AC) reaction was examined during the 4 visits while IOP was measured during the last 3 and CMT was measured only in the last one. RESULTS: The current clinical trial study compared 2 samples with 2 different prophylaxis methods. No endophthalmitis case reported in both group. By a 2-Sample t-test, the IC-treated group (group 2) had statistically significant lower AC cells at the 1st day postoperative visit than the other group while there were no statistically significant differences at 1wk, 1 mo and 3mo visits between the 2 groups. There was no statistically significant difference at 3mo visits in IOP and CMT between the two groups. A breakthrough inflammation rate with the topical medication was (9.6%) while in the other group (IC treated ) was 4.0%. A significant IOP elevation ≥10 mm Hg at 1mo in 2.4% within the topical medication group which was higher than the rate in the other group (0.8%). CONCLUSION: In addition to the safety and effectivity of the combination of intracameral moxifloxacin and subconjunctival triamcinolone in preventing infection and inflammation after cataract surgery. The majority (480) of our included patients didn’t require any topical postoperative medication that is cost saving for the patient, helped patients who were unable to administer topical medication, and decreased chance of complication related to patient poor adherence to postoperative medication.