I just had a IM kenalog80 injection in my butt with no problems y...

I just had a IM kenalog80 injection in my butt with no problems yet. but I thought some would find useful these very clear warnings on a Canadian site after much searching. Too bad US patients can't find the same info as easily. ****** "Unless a deep i.m. injection is given, local atrophy is likely to occur. (For recommendations on injection techniques, see Dosage.) Due to the significantly higher incidence of local atrophy when the material is injected into the deltoids area, this injection site should be avoided in favor of the gluteal area." "injection should be made deeply into the gluteal muscle (see Warnings). For adults, a minimum needle length of 4 cm is recommended. In obese patients, a longer needle may be required. Use alternative sites for subsequent injections." I've been trying to find out how long the shot will last. Some sites seem to say 30 to 40 days and others say longer but don't say how long. How long does it last? - a new user