43. It is permissible to tear the wrapping off a syringe, medication or IV fluid container, including tearing through a perforation. If possible, one should tear between letters or words and not through print.
44. A non-seriously ill patient may be treated with subcutaneous or intramuscular injections on the Sabbath. However, one should not swab with cotton wool or gauze soaked in alcohol, even if held with forceps and even if soaked before the Sabbath. One should preferably use nylon (non-absorbent) swabs if available, or, if not, alcohol or iodine should be poured on to the appropriate part of the body and then wiped off with absorbent cotton wool or gauze. A syringe with a pre-attached needle should preferably be used; if there is real need, the appropriate needle may be attached to a syringe for use.
 Shemirat Shabbat Kehilchata 9, note 48.
 Shemirat Shabbat Kehilchata 9:4 and 9:4.
 Shemirat Shabbat Kehilchata 33:7.
 Shemirat Shabbat Kehilchata 33:10.
 See R. Sh.Z. Auerbach in Shemirat Shabbat Kehilchata Pt. 3, ch. 35, note 63. See also Nishmat Avraham Pt. 5, Orach Chayyim 313:1; Shemirat Shabbat Kehilchata 33, note 43; and Nishmat Avraham Pt. 1, Orach Chayyim 313:1 and pages 355-364. See Resp. Or le-Tsiyyon Pt. 2, 36:19, which is prohibitive.