Could Botox Cause Raised GGT Levels in the Blood?

Botox has a local effect only and there are no studies which demonstrate that it has effects on the liver. 

Cosmetic Botox has no effect on the liver and this has never been reported as a side effect from Allergan, despite tens of millions of procedures being done. Honestly, even small amounts of alcohol within 24 hours of your GGT test may cause a temporary increase in the GGT levels. If you had a drink or two before your GGT test, your results may be off. Additionally some drugs can raise GGT levels like phenytoin, carbamazepine, and barbiturates. Use of many other prescription and non-prescription drugs, including nonsteroidal anti-inflammatory drugs (NSAIDs), lipid-lowering drugs, antibiotics, histamine receptor blockers, antifungal agents, antidepressants, and hormones such as testosterone, can increase GGT levels. If you have taken any of these close to the time you had your GGT test done, you should probably notify your physician because that's often the cause of these higher levels.