Which medicine is best to increase stamina?

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Caffeine
How it works: Caffeine is a stimulant that increases alertness and reduces perceived effort during exercise, which can enhance stamina and endurance.
Usage: Commonly found in coffee, tea, or as a supplement. It can help boost physical performance, especially in aerobic exercises.
2. Creatine
How it works: Creatine helps supply energy to muscles during high-intensity, short-duration activities like sprinting or weightlifting.
Usage: Available in powder or pill form, creatine can improve performance in strength-based and explosive exercises, which indirectly improves stamina by allowing for longer, more effective workouts.
3. Beta-Alanine
How it works: Beta-alanine buffers lactic acid build-up in muscles during intense exercise, delaying fatigue and improving endurance, especially in activities lasting from 1 to 4 minutes.
Usage: Available as a supplement in powder or pill form.
4. Nitric Oxide Boosters (L-arginine, L-citrulline)
How it works: These amino acids help increase nitric oxide production, improving blood flow and oxygen delivery to muscles, which enhances endurance.
Usage: Typically taken in supplement form before workouts to improve exercise performance.