This is just a general prescription question (I haven't needed to use a medication on prescription until recently). I've got a valid Rx for 10ml of 200mg/ml Test-Cyp, to be taken at 200mg E14D. This is a five month supply, at that dosage. My endo issued a new Rx today for 150mg E7D, so basically 50% more dosage (the large increase is a different matter entirely, but not relevant to this thread directly). Do I wait for my existing 10ml vial to run out before refilling under the new Rx, or do I make the trip to pharmacy this week and hand over the new script, even though I have enough medication on hand for another 3 months? Would the Rx expire if not filled immediately?