I have a serious case of tonsilitis. It's so hard-core, I've been prescribed an equally hard-core anti-biotic (Clarithromycin 250mg) after penicillin did nothing to combat it. It all seemed fine, until I looked at the list of side-effects:

• Rashes
  
• Breathing difficulties and facial swelling
  
• Severe diarrhoea with blood and/or mucus
  
• Mouth, lip and skin ulcers
  
• Stomach problems (vomiting, pain, indigestion)
  
• Pins and needles
  
• Headache
  
• Joint pain
  
• Muscle pain or loss of muscle tissue
  
• Inflammation of the tounge or mouth
  
• Discolouration of the tounge or mouth
  
• Thrush (should be fine here)
  
• Changes in sense of taste and smell
  
• Tooth discolouration
  
• Dizziness
  
• Difficulty sleeping
  
• Ringing in the ears of hearing loss
  
• Liver problems (eg. hepatitis and jaundice)
  

How lovely. Now for the possible mental side-effects!

• Anxiety
  
• Confusion
  
• Loss of bearings
  
• Hallucination
  
• Change in sense of reality
  
• Panicking
  

BUT WAIT! THERE'S MORE! TAKE CLARITHROMYCIN TODAY AND GET A SHOT AT THE RARE EFFECTS

• Fainting as a result of low blood sugar
  
• Kidney problems (eg.protein in urine or kidney faillure)
  
• Pancreas inflammation
  
• Convulsions
  
• Reduction of white blood cells in the body which increase chances of infection (like HIV)
  
• Reduction in blood platlet levels which increases the risk of brusing and bleeding (like haemophilia)
  

Even better, there's two "super rare" side-effects:

• Inflammation of the eye
  
• Changes in heart rhythm