How you take progesterone depends on the form prescribed: oral capsules, vaginal inserts or gels, topical cream, or intramuscular injections. Each route has specific timing, preparation, and technique that affect how well the hormone is absorbed. Here’s what to know for every common form.
Oral Capsules: Timing and Food
Oral micronized progesterone comes as a capsule you swallow once daily, typically in the evening or at bedtime. The bedtime timing isn’t arbitrary. Progesterone can cause drowsiness and dizziness, so taking it before sleep lets you sleep through those effects rather than dealing with them during the day.
Take your capsule at roughly the same time each evening. Eating something with it makes a meaningful difference: food doubles the absorption of oral micronized progesterone compared to taking it on an empty stomach. A small snack or a meal is enough. Grapefruit and grapefruit juice can interfere with how your body processes the hormone, so check with your prescriber about whether to avoid them.
If you’re using progesterone as part of hormone replacement therapy, the standard approach is either 200 mg daily for 12 to 14 days of each cycle (cyclical dosing) or 100 mg every day without a break (continuous dosing). Your prescriber will choose the pattern based on whether you’re still having periods and what estrogen regimen you’re on. The goal in both cases is to protect the uterine lining from the effects of estrogen given alone.
What to Do If You Miss a Dose
If you’re taking progesterone-only pills for contraception and you miss a dose by more than three hours, take the pill as soon as you remember and continue your regular schedule, even if that means two pills in one day. Use condoms or avoid intercourse for the next two days until you’ve taken pills correctly and on time for two consecutive days. If you had unprotected sex during the gap, emergency contraception is worth considering.
For newer formulations containing drospirenone, a single late pill (less than 48 hours overdue) just needs to be taken right away with no extra precautions. Missing two or more consecutive pills requires backup contraception for seven days.
If you’re taking progesterone for hormone therapy or fertility support rather than contraception, the stakes are different. Take the missed dose as soon as you remember, but skip it entirely if it’s almost time for your next one. Never double up to compensate.
Vaginal Inserts and Gels
Vaginal progesterone bypasses the digestive system entirely, delivering the hormone directly to the uterus. It’s commonly prescribed during fertility treatments and early pregnancy support. Both tablets and gels come with a single-use applicator.
Vaginal Tablets
Wash and dry your hands, then unwrap the applicator and remove the tablet from its blister pack. Place the tablet in the open end of the applicator, where it should fit snugly. You can stand, sit, or lie down with your knees bent, whichever feels most comfortable. Insert the applicator gently, the same way you would a tampon applicator, and press the plunger to release the tablet. Remove the applicator and throw it away. Each applicator is single-use.
Vaginal Gel
The gel comes in a prefilled applicator with a separate plunger. After opening the sealed wrapper, insert the plunger into the open end until it clicks into place (you’ll see about an inch of the plunger sticking out). Twist off the cap counterclockwise, but don’t press the plunger while removing the cap or you’ll waste the dose. Lie on your back with knees bent or sit on the edge of a bed with knees apart. Insert the applicator and press the plunger to release the gel. Discard the applicator after use.
Some gel residue may accumulate over several days of use. This is normal and doesn’t need to be removed, as the active hormone has already been absorbed.
Intramuscular Injections
Progesterone in oil is given as an intramuscular injection, most often during IVF cycles. Many people learn to do these at home, either self-injecting or with a partner’s help. The technique matters because progesterone oil is thick, and poor injection habits lead to painful lumps at the site.
You’ll need a 3 mL syringe, an 18-gauge needle for drawing up the medication (the thicker needle pulls the oil out of the vial more easily), and a 22-gauge needle for the actual injection. Start by washing your hands and cleaning the rubber stopper of the vial with an alcohol swab. Attach the 18-gauge draw-up needle, pull back the plunger to fill the syringe with air equal to your dose, then inject that air into the vial. Invert the vial and draw out the prescribed amount. Swap to the thinner 22-gauge needle for injection.
The injection goes into the upper outer quadrant of the buttock. A quick, dart-like motion works best for getting through the skin. Push the needle in completely so none of it is visible, then inject slowly with steady pressure. After pulling the needle out, apply a warm compress to the site and massage the area for about five minutes. This helps the thick oil disperse and reduces the chance of a hard, sore lump forming.
Rotate between the left and right sides daily. If the injections are painful, a numbing cream containing lidocaine applied about an hour beforehand (covered with a bandage) can help. Apply a penny-sized amount to the site without rubbing it in, cover it, then wipe it away before injecting.
Topical Cream
Progesterone cream is applied to areas where the skin is thin and blood flow is good: the inner arms, inner thighs, abdomen, or behind the knees. Apply the amount your prescriber specifies and rotate between sites to prevent skin irritation in any one area. If you’re using it specifically for breast tenderness, you can apply it directly to the breast skin. The cream absorbs through the skin into the bloodstream, so avoid washing the area immediately after application.
Side Effects Across All Forms
Drowsiness is the most common side effect of oral progesterone, which is why bedtime dosing is standard. Vaginal forms tend to cause less drowsiness but can produce local irritation or discharge. Injections often cause soreness, redness, or small lumps at the injection site, especially over weeks of daily use. Bloating, headaches, and mood changes can occur with any form.
Progesterone is not appropriate for everyone. Current breast cancer is a firm contraindication. A history of breast cancer with no recurrence for five years is still considered a relative concern. Unexplained vaginal bleeding should be evaluated before starting progesterone. Certain seizure medications and the antibiotic rifampin can reduce the effectiveness of some progesterone formulations, so your prescriber needs a full medication list before writing the prescription.
Which Form Absorbs Best
Each route delivers progesterone differently. Oral capsules are convenient but undergo significant processing by the liver before reaching the rest of the body, which is why food-enhanced absorption matters so much. Vaginal progesterone achieves high concentrations directly in the uterus with lower levels in the bloodstream, making it ideal for fertility and pregnancy support. Intramuscular injections produce the most consistent blood levels, which is why they remain the standard for IVF luteal phase support. Topical creams produce variable absorption depending on application technique, skin thickness, and the specific product.
Your prescriber chose a specific form for a reason tied to your diagnosis and goals. Switching forms on your own, even between over-the-counter creams and prescription products, can result in very different hormone levels.