Beyond-use date: difference between revisions
Diff·revision 44 → 45·18:36, 10 Jul 2025
Difference between revision 44 and revision 45 of Beyond-use date. 2 lines changed; the page grew by 350 bytes.
| Revision 44 — 16:23, 1 Jul 2025 TSH_Tallulah (talk) link to the policy rather than restating it 15,368 bytes ±0 | Revision 45 — 18:36, 10 Jul 2025 CoI_Corin (talk) convert prose to table for comparability 15,718 bytes +350 | ||
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| 104 | A lyophilised vial is reconstituted on 12 March and stored refrigerated. A 28-day period gives a beyond-use date of 9 April: the count runs from the day of preparation, and the beyond-use date is the last day on which the preparation may be used, not the first on which it may not — a convention on which sources differ, so that a stated date without a stated convention is ambiguous by a day. | 104 | A lyophilised vial is reconstituted on 12 March and stored refrigerated. A 28-day period gives a beyond-use date of 9 April: the count runs from the day of preparation, and the beyond-use date is the last day on which the preparation may be used, not the first on which it may not — a convention on which sources differ, so that a stated date without a stated convention is ambiguous by a day. |
| 105 | 105 | ||
| + | 106 | The ''shorter-of'' rule then applies. If the lyophilised material carried a manufacturer's expiration date of 30 March, that date governs and the beyond-use date is 30 March, not 9 April, because a preparation cannot outlive the component it was made from. If instead the expiration date were 30 June, the 28-day beyond-use date of 9 April governs. | |
| + | 107 | ||
| 106 | == References == | 108 | == References == |
| 107 | {{reflist}} | 109 | {{reflist}} |