Comprehensive medication guide to Tri-Lo-Mili including estimated pricing, availability information, side effects, and how to find it in stock at your local pharmacy.
Estimated Insurance Pricing
$0 copay for most commercial insurance and Medicaid under the ACA contraceptive mandate; some grandfathered or exempt plans may charge a copay of $10–$30.
Estimated Cash Pricing
$45–$130 retail per 28-day pack; as low as $9.39 with GoodRx or $8.93 with SingleCare coupon — no sign-up required.
Medfinder Findability Score
72/100
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Tri-Lo-Mili (norgestimate and ethinyl estradiol) is a prescription triphasic combination oral contraceptive pill manufactured by Aurobindo Pharma USA. It is a generic equivalent of the discontinued brand-name Ortho Tri-Cyclen Lo and is FDA-approved for use in females of reproductive potential to prevent pregnancy.
Tri-Lo-Mili is classified as a "low-dose" contraceptive because it contains only 0.025 mg of ethinyl estradiol — lower than many other combination pills. It is a "triphasic" pill, meaning the norgestimate (progestin) dose changes across three phases of the 21-day active pill cycle: 0.180 mg in week one, 0.215 mg in week two, and 0.250 mg in week three. This design aims to mimic the natural hormone fluctuations of the menstrual cycle more closely than single-dose pills.
Each 28-tablet blister pack includes 21 active pills in three color-coded groups and 7 green placebo (reminder) tablets for week four. Tri-Lo-Mili does not protect against sexually transmitted infections (STIs), including HIV.
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Tri-Lo-Mili prevents pregnancy through three complementary mechanisms. The primary mechanism is ovulation suppression: ethinyl estradiol suppresses follicle-stimulating hormone (FSH), preventing egg follicle development, while norgestimate (converted to its active metabolite norelgestromin) suppresses the luteinizing hormone (LH) surge that triggers ovulation. Without ovulation — no egg released — fertilization cannot occur.
The secondary mechanism is cervical mucus thickening. Norgestimate causes the mucus at the cervical opening to become thicker and less permeable, creating a physical barrier that inhibits sperm from reaching the fallopian tubes. The tertiary mechanism is endometrial thinning: both hormones reduce the thickness and receptivity of the uterine lining, making implantation of a fertilized egg far less likely even if ovulation and fertilization were to occur.
The triphasic dosing pattern — gradually increasing norgestimate over three weeks — aims to reduce total monthly hormone exposure while maintaining effective contraceptive coverage and cycle control. Both active hormones are rapidly absorbed orally, with peak plasma concentrations within approximately 2 hours of ingestion. Daily dosing is essential because the half-lives of ethinyl estradiol (12-14 hours) and the norgestimate metabolite (12-30 hours) require consistent replenishment to maintain suppression of the hypothalamic-pituitary-ovarian axis.
0.180 mg norgestimate / 0.025 mg ethinyl estradiol — tablet (Week 1 — white to off-white)
First phase of the triphasic cycle; 7 tablets
0.215 mg norgestimate / 0.025 mg ethinyl estradiol — tablet (Week 2 — pale blue to bluish-white)
Second phase of the triphasic cycle; 7 tablets
0.250 mg norgestimate / 0.025 mg ethinyl estradiol — tablet (Week 3 — blue to light blue)
Third phase of the triphasic cycle; 7 tablets
Placebo (no active ingredients) — tablet (Week 4 — green reminder pills)
7 inert placebo pills to maintain daily habit; withdrawal bleeding occurs during this week
As of 2026, Tri-Lo-Mili is not listed on the FDA's official Drug Shortages Database, and norgestimate/ethinyl estradiol (triphasic, low-dose) has no nationwide shortage designation. The underlying active ingredients are widely manufactured and available. However, individual pharmacies may not stock Tri-Lo-Mili specifically — instead carrying a different generic equivalent such as Tri-Lo-Sprintec, Tri-Lo-Estarylla, or Tri-Lo-Marzia based on their preferred supplier contracts.
Patients who encounter stock issues at one pharmacy are often able to find their medication at a nearby location, at a mail-order pharmacy, or by accepting a therapeutically equivalent generic substitute with their prescriber's authorization. Findability challenges are local and short-term rather than systemic. The findability score reflects generally good availability with occasional localized stocking gaps.
If you're having trouble locating Tri-Lo-Mili at your pharmacy, medfinder calls pharmacies near you to find which ones have it in stock. Enter your medication, dosage, and location — and results are texted to you, saving you from calling pharmacies yourself.
Tri-Lo-Mili is not a controlled substance, so it can be prescribed by any licensed healthcare provider with prescriptive authority. No special DEA registration or controlled substance license is required.
OB/GYNs (Obstetrician-Gynecologists)
Primary care physicians (family medicine, internal medicine)
Nurse practitioners (NPs) and physician assistants (PAs)
Certified nurse midwives (CNMs)
Planned Parenthood providers and reproductive health clinic staff
Pharmacists (in states with pharmacist-prescribing laws, including CA, CO, HI, NM, OR, and others)
Telehealth platforms including Nurx, Pandia Health, Planned Parenthood Direct, Wisp, and Hey Jane offer Tri-Lo-Mili prescriptions in most US states without requiring an in-person visit. Many can issue a prescription within 24 hours after completing an online intake form, and several also ship the medication directly.
No. Tri-Lo-Mili is not a controlled substance and is not scheduled by the DEA. It is a standard prescription medication that can be prescribed by any licensed healthcare provider with prescriptive authority, including OB/GYNs, primary care physicians, nurse practitioners, physician assistants, and certified nurse midwives.
Because it is not a controlled substance, Tri-Lo-Mili can be prescribed in 90-day or 12-month supplies (most insurance plans must cover a full 12-month supply at once under ACA rules), can be refilled at any participating pharmacy, and in many states can even be prescribed by a pharmacist directly without a separate provider visit. There are no special dispensing restrictions beyond a standard prescription requirement.
Most side effects are mild and improve after the first 2-3 months of use. Common side effects include:
Nausea (especially in the first few weeks; take with food)
Headache or migraine
Breast tenderness or swelling
Spotting or breakthrough bleeding (common in first 3 months)
Bloating and fluid retention
Weight changes (usually fluid-related)
Mood changes or depression
Decreased libido
Stop Tri-Lo-Mili and seek immediate medical care if you experience signs of blood clots (chest pain, leg pain/swelling, shortness of breath), stroke (sudden numbness, slurred speech, vision loss, severe headache), heart attack (chest pressure, jaw/arm pain, sweating), or liver problems (yellowing skin or eyes, dark urine, severe abdominal pain). Tri-Lo-Mili carries an FDA Black Box Warning: women over 35 who smoke should not use this medication due to significantly elevated cardiovascular risk.
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Tri-Lo-Sprintec
Identical active ingredients (norgestimate/EE 0.025 mg triphasic); direct generic equivalent of Ortho Tri-Cyclen Lo. Most widely stocked in this drug class.
Tri-Lo-Estarylla
Same active ingredients and doses as Tri-Lo-Mili; another generic equivalent of Ortho Tri-Cyclen Lo. Often among the lowest-priced generics.
Tri-Lo-Marzia
Identical norgestimate/EE 0.025 mg triphasic formulation; may be preferred by certain insurance formularies.
Tri-Sprintec
Same triphasic norgestimate pattern but with higher estrogen (0.035 mg EE); FDA-approved for acne in addition to contraception.
Yaz (drospirenone/ethinyl estradiol)
Low-estrogen monophasic pill with a different progestin (drospirenone); FDA-approved for contraception, PMDD, and acne.
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Rifampin / Rifabutin
majorPotent CYP3A4 enzyme inducers that significantly reduce blood levels of ethinyl estradiol and norgestimate, potentially overcoming contraceptive protection. Use backup contraception during rifampin/rifabutin therapy and for at least 28 days after stopping.
Anticonvulsants (phenytoin, carbamazepine, phenobarbital, topiramate, oxcarbazepine)
majorEnzyme inducers that reduce COC hormone levels, potentially reducing contraceptive effectiveness. Use backup contraception or consider a non-hormonal contraceptive method.
St. John's Wort
majorHerbal CYP3A4 inducer that can significantly reduce norgestimate and ethinyl estradiol levels. Unwanted pregnancies have been reported. Avoid concurrent use or use backup contraception.
Ombitasvir/paritaprevir/ritonavir (Hepatitis C drugs)
majorAbsolute contraindication. Co-administration causes dramatic ALT elevation (liver toxicity). Tri-Lo-Mili must be discontinued before starting these Hepatitis C regimens.
HIV antiretrovirals (ritonavir, lopinavir, other protease inhibitors)
majorComplex interactions — some significantly increase or decrease hormone levels unpredictably. Discuss alternative contraceptive methods with HIV specialist and OB/GYN.
Modafinil (Provigil)
moderateModerate CYP3A4 inducer that can reduce COC effectiveness. Use backup contraception during modafinil therapy and for one month after stopping.
Cyclosporine
moderateTri-Lo-Mili can increase cyclosporine blood levels, potentially causing toxicity. Monitor cyclosporine levels closely.
Theophylline
moderateTri-Lo-Mili may increase theophylline levels. Monitor for theophylline toxicity symptoms.
Tri-Lo-Mili is a well-established, low-dose triphasic oral contraceptive with a strong safety record. As a generic equivalent of the discontinued brand-name Ortho Tri-Cyclen Lo, it is one of several interchangeable options in this drug class — all containing the same active ingredients (norgestimate and ethinyl estradiol) in the same triphasic doses. The primary challenge for patients in 2026 is not a shortage, but rather navigating which generic equivalent their specific pharmacy stocks and insurance covers.
The most effective strategy for patients is to have their prescriber write for the generic by active ingredient name with substitution authorization — giving pharmacists the flexibility to dispense whichever equivalent is in stock and covered. Most insured patients pay $0 under ACA contraceptive mandate coverage, and uninsured patients can access the drug for $8.93–$9.39 per pack with free discount coupons like SingleCare or GoodRx.
If you're struggling to locate Tri-Lo-Mili at a pharmacy near you, medfinder can help. Enter your medication, dosage, and zip code — and medfinder calls pharmacies near you to find which ones have it in stock. Results are texted to you, saving you from hours of frustrating calls.
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Our medication guides are researched and written to help patients make informed decisions. All content is reviewed for accuracy and updated regularly. Learn more about our standards
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