Clinical Information
Use as directed by your healthcare provider. If you miss a scheduled dose, contact your clinic to set a new time. Do not try to inject yourself unless your provider has trained you. Your provider will decide how often and how long you need treatment.
After injection, L-Arginine enters your bloodstream and is turned into nitric oxide. Nitric oxide relaxes the muscles that tighten blood vessels, allowing them to open wider. Blood flow usually improves within 15–30 minutes and can last several hours. Regular use may support better circulation, exercise stamina, and wound healing over weeks to months.
Do not use if you are pregnant, planning pregnancy, or breastfeeding (safety is not proven). Do not use if you have recently had a heart attack or have very low blood pressure, as it can worsen these conditions. Avoid if you are allergic to arginine or any ingredient in this product. People with severe kidney disease, liver cirrhosis, active herpes infections, or uncontrolled asthma should not use this medication unless a specialist approves and closely monitors them.
May increase the blood-pressure-lowering effect of nitrates (Nitrostat), sildenafil (Viagra) and other PDE5 inhibitors, ACE inhibitors (lisinopril), beta blockers, and diuretics, raising dizziness or fainting risk. Can raise potassium when taken with potassium-sparing diuretics like spironolactone. May lower blood sugar further when used with insulin or other diabetes drugs. Use caution with herbal supplements that lower blood pressure, such as hawthorn or garlic. Always tell your provider about all medicines, vitamins, and supplements before each injection.
Very common (more than 1 in 10 people): mild flushing or warmth at injection site, transient drop in blood pressure that may cause light-headedness. Common (1–10 in 100 people): stomach cramps, diarrhea, bloating, headache, gout flare. Uncommon (1–10 in 1,000 people): airway inflammation or worsening asthma, allergic rash, blood changes seen on lab tests. Rare but serious: severe low blood pressure, severe allergic reaction with swelling or trouble breathing. Most mild effects improve within a few hours; seek medical help right away for serious or lasting symptoms.
Store in the original glass vial at controlled room temperature 68–77 °F (20–25 °C). Keep away from direct light; do not freeze. Do not use if solution turns cloudy, changes color, or contains particles. Once the rubber stopper is pierced, use the remaining solution within 28 days or as directed by your pharmacy. Return unused or expired vials to a medication take-back site or follow local sharps disposal rules.
Frequently Asked Questions
Q:How is L-Arginine injection given?
A:A nurse or trained provider will give it into a vein (IV) or a large muscle (IM). Do not self-inject unless your provider has shown you exactly how.
Q:When will I feel results?
A:Improved blood flow can occur within 15–30 minutes. Benefits like better exercise stamina or circulation may take several weeks of regular treatment.
Q:Can I take L-Arginine pills instead?
A:Oral supplements exist, but injected L-Arginine reaches the bloodstream faster and in higher amounts. Ask your provider which form fits your health goals.
Q:Is it safe to use with my blood pressure medicine?
A:L-Arginine can lower blood pressure further. Tell your provider about all BP medicines so doses can be adjusted and your pressure monitored closely.
Q:What should I do if I feel dizzy after the shot?
A:Sit or lie down right away and drink some water. If dizziness lasts more than a few minutes or is severe, contact your provider or seek emergency care.
Q:How do I store the vial at home?
A:Keep it at room temperature, away from sunlight, and out of children’s reach. Do not refrigerate or freeze. Discard any leftover solution 28 days after first use.
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