Medical Share on Facebook Share on Twitter Share on Pinterest Share on LinkedIn Once approved, a medical marijuana card is active for a year and must be renewed. You must be 21 years and older and a Virginia resident to qualify Share on Facebook Share on Twitter Share on Pinterest Share on LinkedIn Articles You May Like How to Make Cannabis Tincture Tax Weed, Stop Policing Adults Legal Weed Is Common Sense How to take Medical Cannabis oil and how the oil is absorbed if you swallow the oil