I have personally injected suboxone at a dose between 1-2 mg. It is a common misconception that the naloxone will cause precipitated withdrawals. You will however experience precipitated withdrawals (no matter the route of administration) if you take buprenorphine products like suboxone or subutex, while other opiates are still in your system. Here is some info with sources about this.
"Suboxone contains buprenorphine as well as the opioid antagonist naloxone to deter the abuse of tablets by intravenous injection. Even though controlled trials in human subjects suggest that buprenorphine and naloxone at a 4:1 ratio will produce unpleasant withdrawal symptoms if taken intravenously by patients who are addicted to opioids, these studies administered buprenorphine/naloxone to patients already addicted to less powerful opiates such as morphine.[3][4][5][6][7] These studies show the strength of buprenorphine/naloxone in displacing opiates, but do not show the effectiveness of naloxone displacing buprenorphine and causing withdrawal symptoms. The Suboxone formulation still has potential to produce an opioid agonist "high" if injected by non-dependent persons which may provide some explanation to street reports indicating that the naloxone is an insufficient deterrent to injection of suboxone.[8][9] The addition of naloxone and the reasons for it are conflicting. Published data clearly shows the Ki or binding affinity of buprenorphine is 0.2157 nM, while that for naloxone is 1.1518 nM.[10] Furthermore, the IC50 or the half maximal inhibitory concentration for buprenorphine to displace naloxone is 0.52 nM, while the IC50s of other opiates in displacing buprenorphine, is 100-1000 times greater.[11] These studies help explain the ineffectiveness of naloxone in preventing suboxone abuse, as well as the potential dangers of overdosing on buprenorphine, as naloxone is not strong enough to reverse its effects" (
source).
"It is a common misconception that the Naloxone in Suboxone initiates precipitated withdrawal. This is false. The Naloxone can only initiate precipitated withdrawal if injected into a person tolerant to opioids other than buprenorphine. Taken sublingually the Naloxone has virtually no effect" (
source).
I hope that helps clear a few things up for you.