Typically it's impossible to lie to your doctor about how much you weigh, given that doctors' offices have scales at the ready. But it's important to tell your GP the truth about your size, even if you may be uncomfortable with it—especially if your weight borders on obese. Research published in the journal
Pharmacotherapy, for instance, found that standard doses of certain antibiotics didn't work for obese individuals. Remember: with your doctor, honesty is always the best policy.