Tizanidine
تیزانیدین
🦴 Musculo-Skeletal SystemMuscle relaxant (alpha-2 agonist)
Market / country: 🇺🇸 USA
Zanaflex (US)
🧮 Dose calculator
Spasticity (MS, spinal cord lesions) · Regimen source: FDA Tizanidine · 2.2
- • Increase by 2–4 mg per dose every 1–4 days; max 36 mg/day. Check liver enzymes at baseline and 1 month. Taper by 2–4 mg/day when stopping. FDA Tizanidine · 2FDA Tizanidine · 2.1FDA Tizanidine · 2.5
Enter age (weight is optional for this regimen).
🛡️ Safety & information
Contraindications
- ⛔ With strong CYP1A2 inhibitors (fluvoxamine, ciprofloxacin); hypersensitivity. FDA Tizanidine · 4
- ⛔ Not established in children. FDA Tizanidine · 8.4
Formulations
- 2 mg tablet (scored) — tablet 🇺🇸 USA FDA Tizanidine · 3
- 4 mg tablet (scored) — tablet 🇺🇸 USA FDA Tizanidine · 3
👥 Special populations
- 🤰 PregnancyUse with caution
Label states no clear risk or has limited data; use only if needed, under medical advice. FDA Tizanidine · 8.1
“Risk Summary There are no adequate data on the developmental risk associated with use of tizanidine tablets in pregnant women.”
- 🤱 BreastfeedingUse with caution
Label: use with caution while breastfeeding; see the label text. FDA Tizanidine · 8.2
“Risk Summary There are no data on the presence of tizanidine in human milk, the effects on the breastfed infant, or the effects on human milk production.”
- 👶 ChildrenSafety not established
Label: safety and effectiveness in children have not been established. FDA Tizanidine · 8.4
“Safety and effectiveness in pediatric patients have not been established.”
- 👴 Older adultsUse with caution
Label: use with caution in older adults, usually starting at the low end of the dose range. FDA Tizanidine · 8.5
“Monitor elderly patients because they may have an increased risk for adverse reactions associated with tizanidine tablets.”
- ⚥ Females & males of reproductive potentialUse with caution
Label has advice on pregnancy testing, contraception or fertility for females and males. FDA Tizanidine · 8.3
“Oral administration of tizanidine to male and female rats resulted in adverse effects on fertility [see Nonclinical Toxicology (13.1) ].”
🔗 Reference links
- FDA (approval record)ANDA076533
- DailyMed (FDA label)FDA Tizanidine
- MedlinePlus (NIH)Tizanidine
- WHO ATC/DDDM03BX02
- Darooyab (Iran)Tizanidine
🇮🇷 Registered in Iran Darooyab · G-2800/Tizanidine
Dosage forms with Iranian generic codes, per Darooyab.
- 11500 · TIZANIDINE 2MG TAB · قرص تیزانیدین ۲ میلیگرم
- 05635 · TIZANIDINE 4MG TAB · قرص تیزانیدین ۴ میلیگرم
📚 Reference status for this drug
Shows which sources have references recorded for this drug and which do not.
- FDA label (DailyMed)✅ PresentFDA Tizanidine · 3FDA Tizanidine · 2.2FDA Tizanidine · 2FDA Tizanidine · 2.1FDA Tizanidine · 2.5FDA Tizanidine · 4FDA Tizanidine · 8.4FDA Tizanidine · 8.1FDA Tizanidine · 8.2FDA Tizanidine · 8.5FDA Tizanidine · 8.3FDA Tizanidine · SPL approval / marketing category
- UK SmPC (eMC / MHRA)❌ Not present
- Published guideline❌ Not present
- Licensed reference (medical school)❌ Not present
- Iranian leaflet (IFDA)❌ Not present
- Pharmacy website (secondary, unreliable)✅ PresentDarooyab · G-2800/Tizanidine
- Clinical review⚠ Unverified