Possible Clues:

• They're a comfort to those retiring in deep trouble taking courage on top of stoicism
• Dissolve two other tablets with cold relief
• Old-fashioned ache relievers
• Trouble with containers, they'll keep you warm
• Electric blanket forerunners
• Steamy things in bed? Nerve ultimately goes following trouble
• In bed, they're always full of trouble!
• Knit wool that's better for warming things
• Rubber bladders providing comfort for the retired