Mephenesin
 Synonym : 
Internuncial Neurone Blocking Agent
 Mechanism : 
It is a topical analgesic that relaxes muscles. It is used in the symptomatic relief of painful muscle spasms, however its use in ointments is based more on rubefacient than relaxing properties.
 Indication : 
- Acute muscle spasms
- Torticollis
- Lumbago
- Backache
- Myalgia
Dosing : 
Available as 0.5%/10%/1%/30 gm cream/ointment.
Apply over the affected area 2-3 times a day.
 Adverse Effect : 
Local erythema and irritation, pruritus and dermatitis.
 Hepatic Dose : 
No dosage adjustments are recommended.