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Someone on Reddit asked: if they gave themselves an injection a second time with the same needle after wiping it with alcohol, how dangerous would that be? The question is about reusing a single needle for self-injection of peptides or other drugs and whether a quick alcohol wipe makes that safe. There’s no dramatic new study here — it’s a practical harm‑reduction question people ask when they’re trying to save money or being careless. A needle is the sharp metal part that pierces the skin, and the syringe is the plastic barrel that holds the drug. When you inject, the needle can pick up tiny bits of tissue, blood, and bacteria from the skin. An alcohol wipe cleans the surface of the skin but doesn’t sterilize the needle once it’s been used. “Peptides” in these conversations usually mean small lab-made proteins people inject for things like bodybuilding, weight loss, or medical experiments. Whether the substance is medically prescribed or bought online, the injection process carries the same risks. What the practical evidence shows is straightforward: reusing needles increases the chance of introducing bacteria into the skin and deeper tissues. That can cause local infections — redness, swelling, pain, pus — and in worse cases abscesses (a pocket of infection) that might need antibiotics or drainage. There’s also a small risk of transmitting bloodborne viruses if needles are shared between people, though a single person reusing their own needle is much less likely to transmit something like hepatitis or HIV to themselves than sharing would be. Studies and medical advice consistently recommend single use because needles dull after one stick, making the second injection more damaging to tissue and more painful, which also raises infection risk. Why this matters: for someone who injects at home, the takeaway is simple. Using a new, sterile needle each time minimizes pain and infection risk. An alcohol wipe on the skin helps, but it doesn’t make a used needle as safe as a new one. If cost or access is the issue, it’s safer to reuse the syringe barrel with a new needle (in some contexts people do this), or to seek harm‑reduction services that provide clean injection supplies, rather than reusing the same needle tip. If you notice increasing redness, warmth, fever, or a growing painful lump after an injection, see a healthcare provider. Caveats and risks: I can’t give medical advice tailored to your situation, and I’m not endorsing injection of unprescribed substances. Some people do reuse needles and never get serious problems, but the risk is real and increases with multiple reuses, poor skin cleaning, or injecting into non-muscle sites. Alcohol doesn’t sterilize a contaminated needle and does not prevent bloodborne virus transmission between people. People with diabetes, weakened immune systems, or poor circulation are at higher risk of complications and should be especially careful. If you’re unsure, talk with a healthcare professional or harm‑reduction organization for safer options. Bottom line: wiping the skin with alcohol then reusing the same needle reduces neither the pain nor the infection risk enough to be considered safe — use a new sterile needle whenever possible.
Source: r/Peptides