What is the proper administration schedule for Althea (hormonal contraceptive) in a female of reproductive age?

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Last updated: February 4, 2026View editorial policy

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How to Take Althea Contraceptives

Take one pill daily at the same time each day for 21 consecutive days, followed by 7 hormone-free days (or 7 days of low-dose pills if using an extended formulation), then start a new pack immediately after the 7-day interval. 1

Standard Dosing Schedule

  • Daily administration: Take one active pill every day, preferably at the same time to maintain consistent hormone levels and maximize contraceptive efficacy 1
  • 21/7 regimen: Most formulations contain 21 active hormone pills followed by 7 placebo or low-dose estrogen pills 1
  • Continuous use: Start the next pack immediately after completing the hormone-free interval without any gap 2

Starting Althea

First-Time Users

  • Timing: Begin on the first day of menstrual bleeding for immediate protection, or start within the first 5 days of your cycle 2
  • Backup contraception: If starting after day 5 of your cycle, use condoms or abstain from intercourse for 7 consecutive days 2
  • Quick start option: Can start immediately any day if reasonably certain you're not pregnant, but requires 7 days of backup contraception 2

After Pregnancy

  • Postpartum (not breastfeeding): Do not start until at least 3 weeks after delivery due to increased blood clot risk 2
  • After abortion: Can start immediately or within 7 days post-abortion with no backup needed if started at time of surgical procedure 2
  • Breastfeeding: Generally avoid combined oral contraceptives in the first 6 months postpartum as they may affect milk supply 2

Managing Missed Pills

One Pill Late (<24 hours)

  • Take the late pill as soon as you remember 2, 1
  • Continue taking remaining pills at the usual time, even if this means taking two pills in one day 2, 1
  • No backup contraception needed 2, 1
  • Emergency contraception not usually needed 2

One Pill Missed (24-48 hours)

  • Take the most recent missed pill immediately and discard any other missed pills 2, 1
  • Continue the remaining pills at the usual time 2, 1
  • Use condoms or abstain from sex for 7 consecutive days 2, 1
  • Consider emergency contraception if pills were missed in the first week AND you had unprotected sex in the previous 5 days 2, 1

Two or More Pills Missed (≥48 hours)

  • Take the most recent missed pill immediately; discard other missed pills 2, 1
  • Continue remaining pills at usual time 2, 1
  • Use backup contraception for 7 consecutive days 2, 1
  • If missed pills occurred in week 3: Skip the hormone-free interval by finishing the current pack and starting a new pack immediately 2
  • Strongly consider emergency contraception if missed pills were in week 1 and unprotected intercourse occurred in the previous 5 days 2, 1

Important Considerations

Vomiting or Severe Diarrhea

  • If vomiting occurs within 3-4 hours of taking a pill, treat it as a missed pill 2
  • Use backup contraception until you've successfully taken pills for 7 consecutive days without vomiting or severe diarrhea 2
  • Severe diarrhea may reduce absorption; follow the same precautions as for vomiting 2

Common Pitfalls to Avoid

  • Don't extend the hormone-free interval beyond 7 days - this is when ovulation risk is highest 2, 1
  • Higher-dose pills (30 μg ethinyl estradiol) provide better protection against pregnancy when pills are missed compared to 20 μg formulations 1
  • Storage matters: Keep pills in a cool, dry place away from heat, which can degrade the medication 2

Breakthrough Bleeding

  • Unscheduled spotting or bleeding is common in the first 3-6 months and generally decreases with continued use 2
  • This bleeding does not indicate contraceptive failure if pills are taken correctly 2
  • If bleeding persists beyond 6 months or is bothersome, consult your healthcare provider to rule out other causes 2

Drug Interactions

  • Certain medications (particularly some antiepileptics and antibiotics) may reduce contraceptive effectiveness 3
  • Always inform healthcare providers that you're taking oral contraceptives when prescribed new medications 3

References

Guideline

Recommended Initial Birth Control Pill Regimen for Healthy Women

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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