• Those under the age of 18

• Active infection near the site of injection

• Known allergy/hypersensitivity to the treatment

• Pregnant or breastfeeding

• Those with abnormal bleeding (e.g. haemophilia, thrombocytopenia)

• Neuromuscular or wasting disease (e.g. myasthenia gravis, Lambert-Eaton syndrome, amyotrophic lateral sclerosis etc.)

• Taking aminoglycoside antibiotics (e.g. amikacin, gentamicin, streptomycin etc.)