The toxin produced by drumstick bacillus cause the contraction of muscular fibers. This condition is accompanied by the painful deformation and rigidity of the body parts.


Robaxin is a muscle relaxing medicine that blocks the nerve impulses transmitted to the brain.


  • The drug is not recommended to the patients with kidney failure and epileptic seizures in history.
  • It is not used during pregnancy, breastfeeding and to the children under the age of 12.
  • Because of the sedative effects, don’t use the drug if you have to drive or manage the mechanical means.
  • The drug changes the color of urine to black, blue or green color.

Pharmacological effect

The mechanism of action of this drug is not yet clear. The drug doesn’t have direct effect on the skeletal muscles. Probably, its effects is related to the sedatives properties.

Side effects


  • Constipation.
  • Dark urine.
  • Eye irritation and nasal congestion.
  • Vertigo and fainting spells.
  • Epileptic seizures.
  • Skin itching and rash.
  • Slow heartbeat.
  • Vomiting.

Less common

  • Blurred vision.
  • Drowsiness and vertigo.
  • Skin reddening.
  • Headache.
  • Sickness and metallic taste in the mouth.
  • Increased anxiety and confusion.

Drug interaction

  • Sedatives (such as alcohol and tranquilizers) increase the sedative effects.


If you note the symptoms of overdose (drowsiness, sickness and increased heart rate), you should do the following:

  • stomach pump;
  • airway clearing;
  • drinking a lot of fluids.


  • Painful muscle spasms – methocarbamol is used together with peace and physical therapy for the treatment of traumas and other muscle pathologies.
  • The additional means of treating tenatus are prescribed alongside with intravenous injection of other drugs.

What to do if you miss the dose of Robaxin?
Take the skipped dosage as soon as you remember.
Skip the missed dosage of methocarbamol, if it’s already time for the next planned drug intake.
Don’t take the additional amount of drug to compensate for a skipped dosage of methocarbamol.