alright now l am 16 years old and l have been experiencing cold symptoms but the doctor said it is more than a cold so he gave me amoxycillin capsules to take three times a day and l look up the side effects for this capsule and one of them was fast heart rate which l have and it is my first time having one capsule and website says some of the side effects go away and some of them will want to seek a doctor very soon and yes l do know l am not 18 years old so l shouldn't be aloud to post this but l am worried about my health a lot