Is Botox Poisonous? Is that true? Does that make Botox dangerous to use?

Just a few examples of "useful" poisons:

Saffron in one of the most expensive spices in the world derived from the crocus flower which if taken in excess is a poison;
Purple foxglove is a poison that is used as a heart medication (digitalis);
Curare is used on poison darts to paralyze people but also used to relax muscles during anesthesia;
Willow bark is the precursor to Aspirin which can cause fatal bleeding but is also useful for preventing or minimizing the effects of heart attacks.

Botox is derived from the bacterial toxin that causes botulism. When used properly and in the correct doses by an experienced injector, Botox is a very safe drug that is probably safer than aspirin

No, Botox is not poisonous. It has been used safely for decades for cosmetic purposes. Botox is made from a purified version of botunlinum toxin, which if ingested in large amounts in an unpurified state could be poisonous, just as the arsenic found in almonds is. The amount of botulinim toxin used in Botox is minuscule. All it will do is relax dynamic muscles that cause wrinkles, allowing the skin to smooth out and look rejuvenated. It can also be used to control a gummy smile, slim the jawline, control excessive sweating, and manage migraines. I hope this helps.

Botox is a form of neurotoxin, therefore technically a poison like many other forms of medication known to our society. The key is that Botox, like Tylenol is typically used in small therapeutic doses with proven safety records. The typical dose of Botox is 50 units or less, while the average toxic dose is in the thousands of units. You can rest assured that although the name "Botox" reveals that is is a neurotoxin, it is one of the safest medications available when used responsibly.

Well, actually, when used in very large doses, Botox can be poisonous. But when Botox Cosmetic is used in the amounts necessary for cosmetic indications it is safer than Aspirin.
While it is common to link press reports of deaths in patients with Cerebral palsy to Botox Cosmetic, it is deceptive. The amount of Botulinum Toxin used for non-cosmetic purposes (such at with patients with cerebral palsy is orders of magnitude higher than used for cosmetic purposes.
To repeat, Botox Cosmetic has a better safety profile than common aspirin and has not been linked to any deaths in millions and millions of treatments. It is a very safe treatment.

Botox treatment for cosmetic improvement of lines and wrinkles has been the most commonly performed cosmetic intervention in the United States for several years running. In the hundreds of thousands of patients successfully treated, there are no reports of "poisoning" from the treatment. Side effects are usually minor, and quite rare- but they do exist, as they would with any other medication.
Bottom line—the drug is safe; but it is a drug. So it should be administered by a well trained and experienced practitioner to a patient who is also well educated about the procedure, the likely outcome, and the potential (if minor and rare) risks.