A Russian wannabe-Hercules has flaunted his jaw-dropping foot wide biceps after undergoing synthol drug injections.

Kirill Tereshin from Pyatigorsk, Russia, proudly paraded the painful-looking results of the injections Saturday, a technique used by some bodybuilders to help them bulk up.

The slender 21-year-old’s disproportionately bulging biceps measure 64cm (2ft) in circumference and are a somewhat disturbing shade of purple. Tereshin says the discoloration is a temporary side-effect, and that he built up his biceps after a month of injections.

Stretch marks frame the biceps, which were achieved through a series of injections using a drug called ‘synthol,’ a blend of mostly oil (85 percent), painkillers and alcohol, according to the US National Center for Biotechnology Information (NCBI).

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Muscle expanding injections are becoming increasingly popular among men who want their physique to resemble that of a bodybuilder. Once injected, the substance expands between muscle fibers and hardens, though it does break down again in the body over time.

Synthol, a legal drug in Russia, is seen by some bodybuilding enthusiasts as a better alternative to steroids, and can be injected into calves, quads, pecs and other muscle groups.

Some of the risks attached to synthol use include nerve damage, skin problems, oil-filled cysts, muscle damage and the development of scar tissue, according to a 2015 research article in the Journal of Health Psychology.