Related Clues:

• Medicine dose, perhaps
• Nasty brute
• Dirty dog
• Rx unit
• Blue guy of ''Yellow Submarine''
• Caplet, e.g.
• Just what the doctor ordered
• Placebo, e.g.
• Caplet
• Hardly a gentleman
• Cruel dude
• Source of pep?
• Nasty fellow
• Malicious one
• Malicious sort