The effects of a B12 injection can be felt within a few hours to a few days, depending on individual metabolism and deficiency levels
This includes pain from diabetes and chemo
Related reading: BPC-157 and Sprain/Ligament Tear Research Why Plantar Fasciitis and Athlete Claims Need Caution Plantar fasciitis and chronic foot pain can involve repeated loading, footwear, foot mechanics, calf tightness, training volume, running surfaces, body weight, occupational standing, age, previous injury history, and rehabilitation quality
After starting and after each dose increase, tirzepatide can cut the peak absorption of an oral contraceptive by more than half, so the label guidance is a non-oral method or added barrier protection for four weeks after starting and four weeks after each increase. It is a first-dose-and-escalation effect, not a permanent block on all oral drugs