Help thiopental injection pain

[marcy2022]

INTRA-ARTERIAL THIOPENTONE

www.sciencedirect.com

"Agonizing pain, described as burning or scalding, spreading down the forearm into the hand immediately follows intra-arterial injection of as little as 2 ml. of 5 per cent solution of thiopentone. This pain is the most constant feature and is rarely absent."

According to the article above lots of pain is to be expected with thiopental injection even at a really small dosage with small concentration.

Can anyone who may have had a surgery where thiopental was used can confirm if its really that painful? If it's that painful, what do they do at hospitals to help patients with the pain cuz agonizing pain with burning sensation doesn't sound like something one can just sit through before the medication takes effect. Even if it takes a few seconds, the patient should be in extreme pain and would react to it with voluntary or involuntary muscle movements I think. Please help.