The core fields worth including every time
Date, dose (mg and units drawn), injection site and zone, and weight if you’re tracking it. These four fields take under a minute to fill in and cover the essentials most people want to look back on.
Why units, not just mg
Writing down both the mg dose and the units actually drawn creates a cross-check: if the units don’t match what the mg dose and current concentration should produce, it’s a prompt to double-check the maths before the next dose, not just after.
Optional but useful fields
A short note on side effects that week, energy levels, or anything unusual (travel, illness, a missed dose) adds context that’s easy to forget by the time you look back a few months later.
Keeping notes short
A single line, “mild nausea day 2, gone by day 4,” is more useful in practice than a paragraph, since it’s actually likely to get written every week rather than skipped when time is short.
A simple weekly template
Week / Date / Dose (mg) / Units drawn / Site / Weight / Note. Six fields, one line, repeated weekly. Simple enough to sustain over months, detailed enough to be genuinely useful later.