Unlikely. Depends on the physician and the indication for the botox. For most cosmetic Botox injections, no lab work (blood tests) are needed.
Botox blood testing. No. Skin testing may be required if you have a suspected allergy to albumen, otherwise no testing is needed.
No. Botox has an excellent safety record and no blood tests are needed prior to treatment.
No. No, no testing is required if you're generally in good health.