20 categories

Practice

The practical mechanics: arithmetic, preparation, handling, administration, and managing what goes wrong.

194 topics10,175 posts48 solved Moderators: bench_notes, KLindqvist About this category

Dosing & titration 35 Reconstitution 33 Administration 33 Storage & stability 30 Side effects 33 Interactions 30

194 topics · page 4 of 7

Topic	Participants	Replies	Views	Activity
Angle of injection and whether 90 degrees is always right Practice › Administration aseptic technique missed dose injection site reaction On the subject in the title: Angle of injection and whether 90 degrees is always right Working notes rather than a conclusion. Something about angle of injection does not reconcile and I would like a second…	+105	116	5.4k	4mo
Splitting a weekly dose in two: the pharmacokinetic argument against Practice › Dosing & titration titration tirzepatide semaglutide missed dose Splitting a weekly dose in two: the pharmacokinetic argument against — setting out what I have, and where I think it stops being reliable. I have read the maintained page on this and I still have a gap, so I…	+24	28	51k	5mo
How the published trials escalated, tabulated side by side Practice › Dosing & titration worked example semaglutide titration dose reduction Solved Closed The question in the title: How the published trials escalated, tabulated side by side I will give what I have already checked below so nobody repeats it. Something about published trials escalated does not…	+4	8	4.2k	5mo
Rotating between abdomen, thigh and upper arm: absorption differences Practice › Administration injection site reaction needle gauge & length missed dose aseptic technique On the subject in the title: Rotating between abdomen, thigh and upper arm: absorption differences Working notes rather than a conclusion. Asking about rotating between abdomen directly, because I have read…		2	3.5k	5mo
A genuinely late dose: what the labelling says and what people do Practice › Administration injection site rotation missed dose needle gauge & length injection site reaction On the subject in the title: A genuinely late dose: what the labelling says and what people do Working notes rather than a conclusion. A methods question rather than a substantive one, about genuinely late…		2	18k	5mo
The lowest dose that does anything: is that a real question? Practice › Dosing & titration dose reduction worked example missed dose titration Asking directly, because I could not find a straight answer: The lowest dose that does anything: is that a real question? I have read the maintained page on this and I still have a gap, so I am asking rather…	+100	111	9.1k	5mo
Storing lyophilised material long term: what governs the shelf life Practice › Storage & stability temperature excursion cold chain freeze-thaw On the subject in the title: Storing lyophilised material long term: what governs the shelf life Working notes rather than a conclusion. I have spent a fortnight trying to pin storing lyophilised material…	+83	90	1k	5mo
Follow-up: "Should I double up?" — answered once, at length, calmly Practice › Administration needle gauge & length aseptic technique injection site rotation subcutaneous injection On the subject in the title: "Should I double up?" — answered once, at length, calmly Working notes rather than a conclusion. A practical question that I suspect has a boring answer, which is why I could not…		2	9.7k	5mo
Why "dose equivalence" between different incretin analogues is a weak concept Practice › Dosing & titration tirzepatide dose reduction titration semaglutide Solved Why "dose equivalence" between different incretin analogues is a weak concept I have a specific reason for asking rather than idle curiosity, and the context is below. I have read the maintained page on this…	+124	133	11k	5mo
Storing in the door of the fridge is worse than you think Practice › Storage & stability cold chain beyond-use date storage freeze-thaw Solved Storing in the door of the fridge is worse than you think Writing it up because I had to work it out twice and would rather nobody else did. Asking about the failure mode rather than the procedure, because…		2	8.3k	5mo
Coming back to: Reconstitution volumes that produce round numbers, tabulated Practice › Reconstitution concentration maths syringe units bacteriostatic water dead volume On the subject in the title: Reconstitution volumes that produce round numbers, tabulated Working notes rather than a conclusion. Writing this out with the numbers in it, because "roughly" is how these go…		2	24k	6mo
Alcohol: what is documented and what is folklore — the long version Practice › Interactions insulin needs a source delayed gastric emptying metformin Solved Alcohol: what is documented and what is folklore — the long version — setting out what I have, and where I think it stops being reliable. A narrow question about Alcohol, deliberately narrow, because the…	+9	13	7.3k	6mo
The nausea timeline across the first four weeks, with a tabulated log — what changed since Practice › Side effects constipation delayed gastric emptying fatigue nausea On the subject in the title: The nausea timeline across the first four weeks, with a tabulated log — what changed since Working notes rather than a conclusion. What changes if the standard account of nausea…	+24	29	2.8k	6mo
A genuinely late dose: what the labelling says and what people do — what changed since Practice › Administration subcutaneous injection missed dose needle gauge & length injection site rotation Solved A genuinely late dose: what the labelling says and what people do — what changed since — setting out what I have, and where I think it stops being reliable. I have read the maintained page on this and I still…	+9	13	474	6mo
Muscle cramps: the ordinary causes before the exotic ones Practice › Side effects vomiting delayed gastric emptying nausea fatigue Closed Muscle cramps: the ordinary causes before the exotic ones Writing it up because I had to work it out twice and would rather nobody else did. Proposing that muscle cramps deserves a maintained page rather than…	+80	90	27k	6mo
What published stability data actually covers, and what it does not — what changed since Practice › Storage & stability freeze-thaw storage temperature excursion cloudy or discoloured solution Solved What published stability data actually covers, and what it does not — what changed since — that is the question, and I have not found it answered plainly anywhere I have looked. What changes if the standard…		3	43k	6mo
Distinguishing expected GI effects from something that needs urgent attention Practice › Side effects nausea hair shedding vomiting delayed gastric emptying Closed Distinguishing expected GI effects from something that needs urgent attention Writing it up because I had to work it out twice and would rather nobody else did. Reporting something rather than asking about…	+88	101	32k	6mo
Early satiety becoming a problem rather than a benefit Practice › Side effects vomiting fatigue hair shedding constipation Closed Early satiety becoming a problem rather than a benefit — setting out what I have, and where I think it stops being reliable. A methods question rather than a substantive one, about early satiety. Everyone…	+20	24	2.5k	6mo
Why "add 2 mL" is not an instruction Practice › Reconstitution reconstitution worked example syringe units dead volume The question in the title: Why "add 2 mL" is not an instruction I will give what I have already checked below so nobody repeats it. Practical question with the units stated, because I have seen how quickly…	+23	27	3.5k	6mo
A partial dose because the pen emptied mid-injection Practice › Administration subcutaneous injection needle gauge & length injection site rotation missed dose Solved A partial dose because the pen emptied mid-injection Writing it up because I had to work it out twice and would rather nobody else did. A methods question rather than a substantive one, about partial dose…	+108	120	1.5k	7mo
Temperature logging at home: what is worth the effort Practice › Storage & stability storage beyond-use date cloudy or discoloured solution temperature excursion Temperature logging at home: what is worth the effort — setting out what I have, and where I think it stops being reliable. An honest uncertainty about temperature logging rather than a disguised assertion. I…		2	6.3k	7mo
[2026 update] Reflux appearing for the first time at a dose step Practice › Side effects constipation delayed gastric emptying nausea vomiting Posting this under the heading it deserves: Reflux appearing for the first time at a dose step Everything below is what sits behind that. Reporting something rather than asking about it, in case the pattern…		2	980	7mo
Follow-up: The decimal-point error, and the habit that catches it Practice › Reconstitution concentration maths bacteriostatic water dead volume reconstitution Closed On the subject in the title: The decimal-point error, and the habit that catches it Working notes rather than a conclusion. A follow-up question about decimal-point error that I did not know to ask the first…	+118	131	50k	7mo
Hair shedding at month three: mechanism and time course Practice › Side effects delayed gastric emptying fatigue constipation hair shedding On the subject in the title: Hair shedding at month three: mechanism and time course Working notes rather than a conclusion. Reading back through what has been written here about hair shedding, three…		2	47k	7mo
Vomiting: when it is expected and when it is a reason to stop Practice › Side effects constipation nausea fatigue Solved Posting this under the heading it deserves: Vomiting: when it is expected and when it is a reason to stop Everything below is what sits behind that. Reporting something rather than asking about it, in case…	+116	124	43k	7mo
Coming back to: Over-dilution: when your dose falls below one readable graduation Practice › Reconstitution worked example dead volume syringe units bacteriostatic water Over-dilution: when your dose falls below one readable graduation Writing it up because I had to work it out twice and would rather nobody else did. I have read the maintained page on this and I still have a…	+90	97	1.1k	7mo
The decimal-point error, and the habit that catches it Practice › Reconstitution syringe units concentration maths worked example bacteriostatic water The decimal-point error, and the habit that catches it Writing it up because I had to work it out twice and would rather nobody else did. An honest uncertainty about decimal-point error rather than a…	+110	121	10k	7mo
Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures Practice › Storage & stability beyond-use date cold chain temperature excursion freeze-thaw Solved Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures Writing it up because I had to work it out twice and would rather nobody else did. Something changed and I would…	+4	8	20k	8mo
Follow-up: Constipation management, with a dietitian's contribution Practice › Side effects nausea fatigue hair shedding Closed Constipation management, with a dietitian's contribution — setting out what I have, and where I think it stops being reliable. A follow-up question about Constipation management that I did not know to ask the…	+31	35	28k	8mo
[2026 update] How much of the diluent volume the powder itself displaces Practice › Reconstitution reconstitution worked example syringe units Wiki Closed The question in the title: How much of the diluent volume the powder itself displaces I will give what I have already checked below so nobody repeats it. Writing this out with the numbers in it, because…	+89	100	3.2k	8mo