Dolishale 28 Day Drug Interactions: What to Avoid and What to Tell Your Doctor

Certain medications, supplements, and even foods can interfere with how well Dolishale 28 Day works — or increase the risk of side effects. Knowing what to watch for and what to tell your doctor can help you stay protected and safe.

This guide covers the most important Dolishale 28 Day drug interactions based on FDA prescribing information.

How Drug Interactions Work With Birth Control

Dolishale 28 Day contains two hormones — levonorgestrel and ethinyl estradiol — that are processed by your liver. Many drug interactions happen because other medications speed up or slow down how your liver breaks down these hormones.

When another drug speeds up hormone metabolism, your body clears the contraceptive hormones faster than normal. This can lower hormone levels enough to reduce effectiveness and allow ovulation to occur. Conversely, some drugs may increase hormone levels, potentially raising the risk of side effects.

Major Drug Interactions (Can Significantly Reduce Effectiveness)

The following medications can significantly reduce how well Dolishale 28 Day prevents pregnancy. If you take any of these, talk to your doctor about using backup contraception or an alternative birth control method:

• Rifampin and other rifamycins (used for tuberculosis and some other infections). Rifampin is the most well-known offender — it can dramatically reduce hormone levels and make oral contraceptives unreliable.
• Certain anticonvulsants (seizure medications) including phenytoin, carbamazepine, phenobarbital, topiramate, felbamate, and oxcarbazepine. These drugs increase liver enzyme activity that breaks down contraceptive hormones.
• HIV protease inhibitors and NNRTIs (HIV medications). Some HIV treatments can reduce oral contraceptive levels. If you're taking HIV medications, your doctor should review specific interactions.
• Hepatitis C direct-acting antivirals (specifically ombitasvir/paritaprevir/ritonavir). This combination is contraindicated with Dolishale 28 Day — they should not be taken together.
• Bosentan (used for pulmonary arterial hypertension). Can reduce contraceptive hormone levels.

Moderate Drug Interactions

These interactions may have a smaller effect but are still worth knowing about:

• Certain antibiotics (ampicillin, tetracyclines). The clinical significance of this interaction is debated, but some healthcare providers recommend backup contraception during antibiotic courses as a precaution.
• Griseofulvin (an antifungal medication). May reduce contraceptive effectiveness.
• Modafinil (used for narcolepsy and sleep disorders). Can speed up hormone metabolism.
• Aprepitant (an anti-nausea medication). May decrease contraceptive hormone levels.
• Lamotrigine (a seizure and mood stabilizer medication). This is a two-way interaction — oral contraceptives can reduce lamotrigine blood levels, potentially triggering seizures. If lamotrigine doses are adjusted while on birth control, stopping the pill can cause lamotrigine levels to spike.
• Thyroid medications. Oral contraceptives may increase thyroid-binding globulin, potentially requiring thyroid dose adjustments.

Supplements and Over-the-Counter Products to Watch

• St. John's Wort. This is the biggest supplement concern. St. John's Wort is an herbal remedy commonly used for mild depression, but it significantly increases liver enzyme activity and can reduce contraceptive hormone levels — similar to rifampin. Do not take St. John's Wort while on Dolishale 28 Day.

Always tell your doctor and pharmacist about all supplements you're taking, including vitamins, herbal products, and over-the-counter medications.

Food and Drink Interactions

• Grapefruit juice. Grapefruit juice may slightly increase ethinyl estradiol levels by slowing its breakdown in the liver. While this isn't usually dangerous, it could slightly increase the risk of estrogen-related side effects in some people.
• Alcohol. Alcohol does not directly interact with Dolishale 28 Day. However, heavy drinking can lead to vomiting, which could prevent the pill from being fully absorbed if you throw up within a few hours of taking it.

What to Tell Your Doctor

Before starting Dolishale 28 Day, make sure your doctor knows about:

• All prescription medications you're taking, including anticonvulsants, HIV medications, antibiotics, and hepatitis C treatments
• All over-the-counter medications and supplements, especially St. John's Wort
• Any upcoming surgeries or medical procedures (you may need to stop oral contraceptives temporarily)
• Any new medications prescribed by another provider — always mention that you're on birth control

When in doubt, ask your pharmacist. They can quickly check for interactions whenever you pick up a new medication.

Final Thoughts

Drug interactions with Dolishale 28 Day can reduce its ability to prevent pregnancy or increase side effects. The most important ones to avoid are rifampin, certain seizure medications, some HIV and hepatitis C drugs, and St. John's Wort. Always keep your healthcare team informed about everything you're taking. For more on managing your treatment safely, read our guide on Dolishale 28 Day side effects. Ready to find your medication? Search Medfinder to check pharmacy availability.