Tramadol 100mg is an opioid based medicine which is used to treat moderate to severe pain conditions. You can buy Tramadol 100mg online in the UK without prescription from Direct UK Pills. It is only used when normal painkillers are no longer effective for pain. It works through a dual mechanism of action in the central nervous system to relieve pain; opioid receptor activity and neurotransmitter reuptake inhibition. By combining these two distinct modes of action, tramadol provides effective pain relief to the user.