Usual Adult Dose for Upper Respiratory Tract Infection
250 to 500 mg orally 3 times a day for 7 to 10 days; alternatively, 500 to 875 mg orally twice a day may be administered
Re Amoxil, Dose does vary according to the problem, but you would not usually be prescribed 1g for common ailments, 500mg should be taken 8 hourly.