Interactions Between Doxycycline and Oral A-Retinoids in Urology - Urology

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The interaction between Doxycycline and oral isotretinoin?


Dear Dr.
Du,
Last week, I visited for a urinary tract infection issue.
After a urinalysis, it was found that there was a slight infection in my bladder.
Since I was already undergoing an oral isotretinoin treatment for mild acne (low dose, 10mg twice a week), I informed the physician to avoid tetracycline medications.
The doctor prescribed cephradine for a week.
After completing the course and returning for a follow-up, the doctor indicated that the infection had significantly improved and prescribed another medication.
At that time, I did not think to remind the doctor again to avoid tetracycline, and after picking up the prescription, I realized it was Doxycycline.
I had previously read that the combination of tetracycline and oral isotretinoin could potentially cause intracranial hypertension.

I would like to ask you, Dr.
Du, how should I proceed:
1.
Continue using both medications (if the interaction risk with low-dose isotretinoin is low or mild).
2.
Discontinue oral isotretinoin and just use Doxycycline.
3.
Consult another physician to obtain a different antibiotic.
I apologize for the trouble, and thank you for your guidance.

kuza, 30~39 year old female. Ask Date: 2019/08/05

Dr. Du Shixi reply Urology


Hello: If you are very concerned about the side effects mentioned by the doctor, you can request a reevaluation.
If it is possible to discontinue tretinoin, you may consider stopping it for now.
Wishing you good health.

Reply Date: 2019/08/05

More Info


When considering the interactions between doxycycline and oral A-retinoids (like isotretinoin), it is essential to understand the pharmacological properties of both medications and the potential risks involved. Doxycycline is a tetracycline antibiotic commonly used to treat various bacterial infections, including those affecting the urinary tract. On the other hand, oral A-retinoids, such as isotretinoin, are primarily used for severe acne treatment and have significant effects on skin cell turnover and sebaceous gland activity.

The concern regarding the concurrent use of doxycycline and oral A-retinoids stems from the potential for increased intracranial pressure, a condition known as pseudotumor cerebri. This condition can lead to symptoms such as headache, visual disturbances, and in severe cases, permanent vision loss. Both doxycycline and isotretinoin have been associated with this risk, although the exact mechanism is not fully understood. The combination of these medications may theoretically increase the risk of this adverse effect, particularly in individuals who may already be predisposed to elevated intracranial pressure.

Given your situation, where you are currently on a low dose of oral A-retinoids (10 mg twice a week) and have been prescribed doxycycline for a urinary tract infection, it is crucial to weigh the benefits of treating the infection against the potential risks of combining these medications. Here are some options to consider:
1. Continue Both Medications with Monitoring: If the dose of isotretinoin is low and you are not experiencing any symptoms of increased intracranial pressure, you might choose to continue both medications. However, it is vital to monitor for any signs of headache, vision changes, or other neurological symptoms. If any of these occur, you should seek medical attention immediately.

2. Temporarily Discontinue A-Retinoids: Another option is to temporarily stop the oral A-retinoids while you complete the course of doxycycline. This approach minimizes the risk of potential interactions and allows for effective treatment of your urinary tract infection. After finishing the antibiotic course, you can resume the A-retinoid therapy, assuming your acne management is still a priority.

3. Consult Another Healthcare Provider: If you are uncomfortable with the current treatment plan or have concerns about the safety of using both medications together, it may be beneficial to consult another healthcare provider. They can provide a second opinion and may suggest alternative antibiotics that do not carry the same risk of interaction with A-retinoids.

In any case, it is crucial to communicate openly with your healthcare provider about all medications you are taking, including over-the-counter drugs and supplements. This information will help them make informed decisions regarding your treatment plan. Additionally, if you experience any unusual symptoms while on these medications, do not hesitate to reach out for medical advice.

In summary, while there is a theoretical risk associated with the concurrent use of doxycycline and oral A-retinoids, the decision on how to proceed should be based on your specific circumstances, including the severity of your urinary tract infection, the effectiveness of your acne treatment, and your overall health. Always prioritize safety and effective communication with your healthcare provider to ensure the best possible outcomes.

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