Hi there,This is Dr Basu, experienced Internal Medicine Specialist. I am here to address your concerns and provide great service.
3.8 cm dilatation is considered a very mild dilatation of the aorta.
However this needs to be monitored with echocardiogram every year.
Most importantly your blood pressure should be controlled well to prevent any further dilatation.
Blood pressure should be around 120/80.
Cholesterol also should be lowered with statins.
LDL level should be below 100 mg/dl.
In case of chest pains, vasodilators like nitrate may be used as well.Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star).Please bookmark my profile for fast, reliable and authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/
All these medications need prescription.
Your GP or a cardiologist should prescribe these medications.
There is no over the counter alternative.
However, you can try fish oil supplements daily.