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 3 of 7

Topic	Participants	Replies	Views	Activity
A reconstituted vial's beyond-use date and the reasoning behind common figures Practice › Storage & stability temperature excursion storage freeze-thaw Posting this under the heading it deserves: A reconstituted vial's beyond-use date and the reasoning behind common figures Everything below is what sits behind that. I have read the maintained page on this…	+125	129	45k	2mo
Follow-up: A parcel that arrived warm: a decision process, not a verdict Practice › Storage & stability temperature excursion cloudy or discoloured solution beyond-use date Posting this under the heading it deserves: A parcel that arrived warm: a decision process, not a verdict Everything below is what sits behind that. Asking about the failure mode rather than the procedure,…	+49	59	1.2k	2mo
Restarting after a long gap: what the labelling implies — the long version Practice › Dosing & titration tirzepatide worked example dose reduction semaglutide Restarting after a long gap: what the labelling implies — the long version 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…	+12	17	2.4k	2mo
Revisiting: Mean kinetic temperature explained without the mathematics Practice › Storage & stability storage cold chain temperature excursion cloudy or discoloured solution Solved Revisiting: Mean kinetic temperature explained without the mathematics 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,…	+67	75	909	2mo
Injection discomfort: needle gauge, volume, temperature, technique Practice › Administration subcutaneous injection injection site reaction needle gauge & length aseptic technique Injection discomfort: needle gauge, volume, temperature, technique — setting out what I have, and where I think it stops being reliable. Injection discomfort: setting out the arithmetic in full, because I…	+66	71	14k	2mo
The arithmetic of an intermediate dose between two label steps Practice › Dosing & titration dose reduction semaglutide missed dose On the subject in the title: The arithmetic of an intermediate dose between two label steps Working notes rather than a conclusion. I have read the maintained page on this and I still have a gap, so I am…		2	136	2mo
Revisiting: The arithmetic of an intermediate dose between two label steps Practice › Dosing & titration titration worked example dose reduction tirzepatide Revisiting: The arithmetic of an intermediate dose between two label steps 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…	+41	45	808	2mo
Delayed gastric emptying and oral medication absorption: which drugs matter — one year on Practice › Interactions needs a source delayed gastric emptying hypoglycaemia insulin Solved Closed On the subject in the title: Delayed gastric emptying and oral medication absorption: which drugs matter — one year on Working notes rather than a conclusion. A follow-up question about Delayed gastric…		3	16k	2mo
Common supplements people ask about, assessed one at a time — a second dataset Practice › Interactions delayed gastric emptying insulin needs a source Posting this under the heading it deserves: Common supplements people ask about, assessed one at a time — a second dataset Everything below is what sits behind that. A follow-up question about Common…	+97	104	15k	3mo
Reconstitution volumes that produce round numbers, tabulated Practice › Reconstitution reconstitution syringe units bacteriostatic water worked example Reconstitution volumes that produce round numbers, tabulated — setting out what I have, and where I think it stops being reliable. Writing this out with the numbers in it, because "roughly" is how these go…	+103	112	1.7k	3mo
Fatigue in the first month: how much is the drug and how much is intake Practice › Side effects vomiting fatigue constipation Solved On the subject in the title: Fatigue in the first month: how much is the drug and how much is intake Working notes rather than a conclusion. Something changed and I would like to know whether it should have.…		4	17k	3mo
Anaesthesia and elective surgery: the aspiration question Practice › Interactions metformin insulin delayed gastric emptying hypoglycaemia Posting this under the heading it deserves: Anaesthesia and elective surgery: the aspiration question Everything below is what sits behind that. A narrow question about anaesthesia and elective surgery,…	+103	115	6.6k	3mo
A widely repeated interaction claim that turns out to be unsupported Practice › Interactions metformin hypoglycaemia delayed gastric emptying needs a source On the subject in the title: A widely repeated interaction claim that turns out to be unsupported Working notes rather than a conclusion. I was wrong about widely repeated interaction claim in a thread last…	+47	51	37k	3mo
Stepping down deliberately, and how to do it without losing progress Practice › Dosing & titration worked example semaglutide tirzepatide dose reduction Stepping down deliberately, and how to do it without losing progress — setting out what I have, and where I think it stops being reliable. Practical question with the units stated, because I have seen how…	+98	102	26k	3mo
Foaming during reconstitution and whether it matters — the long version Practice › Reconstitution reconstitution bacteriostatic water worked example concentration maths Foaming during reconstitution and whether it matters — the long version — setting out what I have, and where I think it stops being reliable. A narrow question about Foaming during reconstitution,…	+100	117	6k	3mo
Converting between mg/mL and units per dose, both directions — the long version Practice › Reconstitution reconstitution worked example syringe units dead volume Converting between mg/mL and units per dose, both directions — the long version Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated,…	+110	132	1.7k	3mo
Light exposure: how much protection is proportionate? Practice › Storage & stability beyond-use date freeze-thaw cold chain cloudy or discoloured solution The question in the title: Light exposure: how much protection is proportionate? I will give what I have already checked below so nobody repeats it. Trying to establish the boundary conditions on light…		2	59	3mo
Reflux appearing for the first time at a dose step Practice › Side effects vomiting fatigue hair shedding constipation Reflux appearing for the first time at a dose step — setting out what I have, and where I think it stops being reliable. Reporting something rather than asking about it, in case the pattern is useful to…		4	36k	4mo
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Practice › Storage & stability beyond-use date freeze-thaw cloudy or discoloured solution storage Closed On the subject in the title: Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Working notes rather than a conclusion. The question about Adsorptive losses that I…	+77	87	58k	4mo
Grapefruit: why this class is not the class that cares Practice › Interactions needs a source hypoglycaemia metformin delayed gastric emptying Grapefruit: why this class is not the class that cares Writing it up because I had to work it out twice and would rather nobody else did. I was wrong about grapefruit in a thread last spring and I would like…	+126	139	4k	4mo
Revisiting: Drawing up with one needle and injecting with another Practice › Administration subcutaneous injection injection site reaction needle gauge & length missed dose Revisiting: Drawing up with one needle and injecting with another Writing it up because I had to work it out twice and would rather nobody else did. A practical question that I suspect has a boring answer,…	+76	83	1.1k	4mo
Air bubbles in a subcutaneous injection: the honest risk assessment — does this still hold? Practice › Administration injection site rotation missed dose aseptic technique subcutaneous injection Wiki Asking directly, because I could not find a straight answer: Air bubbles in a subcutaneous injection: the honest risk assessment — does this still hold? An honest uncertainty about Air bubbles rather than a…	+21	30	20k	4mo
Second pass at: Choosing a concentration on purpose rather than by accident Practice › Reconstitution reconstitution syringe units concentration maths Second pass at: Choosing a concentration on purpose rather than by accident Writing it up because I had to work it out twice and would rather nobody else did. Posting a small dataset on Choosing a…	+49	54	6k	4mo
Follow-up: Levothyroxine timing: a real interaction with a simple fix Practice › Interactions metformin needs a source hypoglycaemia insulin Closed On the subject in the title: Levothyroxine timing: a real interaction with a simple fix Working notes rather than a conclusion. A follow-up question about Levothyroxine timing that I did not know to ask the…	+2	6	8.1k	4mo
Adsorptive losses at low concentration, and why dilute solutions are fragile Practice › Storage & stability storage cold chain beyond-use date Adsorptive losses at low concentration, and why dilute solutions are fragile — setting out what I have, and where I think it stops being reliable. Collecting what is known about adsorptive losses in one…	+16	20	1.7k	4mo
[2026 update] Distinguishing expected GI effects from something that needs urgent attention Practice › Side effects vomiting fatigue constipation delayed gastric emptying On the subject in the title: Distinguishing expected GI effects from something that needs urgent attention Working notes rather than a conclusion. Reporting something rather than asking about it, in case the…	+10	14	11k	4mo
Reading an interaction checker output critically Practice › Interactions metformin delayed gastric emptying needs a source On the subject in the title: Reading an interaction checker output critically Working notes rather than a conclusion. A question about reading an interaction checker output that I think has a definite answer,…	+144	152	3k	4mo
Dizziness on standing and the electrolyte explanation Practice › Side effects hair shedding fatigue vomiting delayed gastric emptying On the subject in the title: Dizziness on standing and the electrolyte explanation Working notes rather than a conclusion. Trying to work out what would count as evidence on dizziness on standing, before…	+3	7	147	4mo
Warfarin and altered intake: the monitoring argument Practice › Interactions hypoglycaemia needs a source insulin Solved Warfarin and altered intake: the monitoring argument — setting out what I have, and where I think it stops being reliable. Proposing that warfarin and altered intake deserves a maintained page rather than a…		2	11k	4mo
Warfarin and altered intake: the monitoring argument — the long version Practice › Interactions metformin needs a source delayed gastric emptying hypoglycaemia Solved Posting this under the heading it deserves: Warfarin and altered intake: the monitoring argument — the long version Everything below is what sits behind that. A narrow question about Warfarin and altered…	+123	134	40k	4mo