I’ve been there and you’ve heard correctly. Four is not a low dose. Check this out ....

90 Day Suboxone Tapering Schedule in Detail. Replacing the starting 2mg with your 4mg and follow the pattern.

*Note: Consult your doctor for any medical decisions, including your Suboxone tapering protocol.

This three month taper schedule has been shown to be effective for patients in buprenorphine detox:

Days 1-14: 2 mg
Days 15-28: 1.5 mg
Days 29-42: 1.0 mg
Days 43-66: 0.5 mg
Day 67: 0.0 mg
Day 68: 0.5 mg
Day 69: 0.0 mg
Day 70: 0.5 mg
Day 71: 0.0 mg
Day 72: 0.5 mg
Day 73: 0.0 mg
Day 74: 0.5 mg
The next process is to dose every third day:
Days 75-76: 0.0 mg
Day 77: 0.5 mg
Day 78-79: 0.0 mg
Day 80: 0.25 mg
Days 81-82: 0.0 mg
Day 83: 0.25 mg
Days 84-85: 0.0 mg
Day 86: 0.25 mg
To taper off Suboxone completely, abstain for three days and then take one last dose:
Days 87-89: 0.0 mg
Day 90: 0.25 mg = Last Dose