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Mifepristone Misoprostol medical abortion dosing regimen administration

GradeResponse

Unwanted Kit — Mifepristone 200 mg + Misoprostol 200 mcg ×4

The Unwanted Kit contains 1 tablet of Mifepristone 200 mg + 4 tablets of Misoprostol 200 mcg each (total 800 mcg).

Indication

Medical termination of pregnancy (MTP) up to 7 weeks (≤49 days) of gestation.

Dosing Regimen

StepDrugDoseRouteTiming
Day 1Mifepristone200 mg (1 tablet)Oral, on empty stomachDay 0
Day 3 (36–48 hrs later)Misoprostol800 mcg (4 × 200 mcg tablets)Vaginal / Buccal / Sublingual36–48 hrs after mifepristone
Minimum interval between mifepristone and misoprostol: 24 hours (WHO Abortion Care Guidelines, p. 108). Standard clinical practice uses 36–48 hours.

Misoprostol Administration Routes

  • Vaginal: Place all 4 tablets deep in the posterior fornix. Most effective, less nausea/diarrhea.
  • Buccal: Place 2 tablets in each cheek pouch, hold for 30 min, then swallow remnants.
  • Sublingual: Place under tongue for 30 min. Highest systemic absorption but more GI side effects.

What to Expect After

  • Cramping & bleeding begin within 1–4 hours of misoprostol — this is the expulsion process.
  • Heavy bleeding with clots is normal for the first few hours.
  • Lighter bleeding may continue for 1–2 weeks.

Follow-Up

  • A clinical review (ultrasound or serum β-hCG) is recommended 14 days after misoprostol to confirm complete abortion.
  • If abortion is incomplete, a repeat dose of misoprostol or surgical evacuation may be needed.

Key Contraindications

  • Gestational age > 7 weeks (for this kit's labeled use)
  • Ectopic pregnancy (must be ruled out first)
  • Chronic adrenal failure, inherited porphyria
  • Long-term corticosteroid therapy
  • Coagulopathy or anticoagulant use
  • IUD in situ (must be removed first)

Common Side Effects

  • Nausea, vomiting, diarrhea (especially sublingual route)
  • Uterine cramping and pain (manage with NSAIDs like ibuprofen)
  • Chills, low-grade fever (transient)
Note: This kit is a prescription medication (Rx). Use under medical supervision only.

This dose i. 4wks of pregnancy

Unwanted Kit at 4 Weeks of Pregnancy

4 weeks gestation is well within the approved window (≤7 weeks / ≤49 days), so the kit is appropriate.
The dosing regimen remains exactly the same — gestational age does not change the dose:

Regimen

StepDrugDoseRouteTiming
Day 1Mifepristone200 mg (1 tablet)OralDay 0
Day 3Misoprostol800 mcg (4 tablets)Vaginal / Buccal / Sublingual36–48 hrs later

At 4 Weeks — What's Different Clinically

  • Higher success rate — the earlier the gestation, the more effective medical abortion is. At ≤4 weeks, complete abortion rates approach 95–98%.
  • Lighter bleeding compared to later gestations — expulsion is faster and less painful.
  • Cramping is milder — less analgesic requirement typically.
  • At very early gestation (< 4 weeks / < 28 days LMP), some guidelines note a slightly higher chance of failed abortion where the sac may not yet be visible on ultrasound, making it harder to confirm success — a follow-up β-hCG or ultrasound at 2 weeks is still essential.

Bottom Line

Same dose, same timing. Earlier gestation = higher efficacy and milder side effects. Confirm complete abortion at 2-week follow-up regardless of gestational age.
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