Each dose level should be held for four weeks. Rushing the increases is not wise. Reactions could still show up even though you just took this amount. Some people including my wife and myself feel nothing all the way to 12 mg. She recently added 2.5 mg of another medication and now has mild nausea.
This marks my fifth injection of the medication. I began with 2 mg for one week then moved to 2.5 mg for three weeks and have now tried 4 mg. Still no negative reactions so far so time will tell. Only five pounds gone up to this point so maybe the larger amount will get fat loss moving.