NutriStack
Doxycycline and Vitamin A, a caution.
Doxycycline and high-dose vitamin A are both associated with intracranial hypertension, also called pseudotumor cerebri. Combining a tetracycline-class antibiotic with concentrated vitamin A or retinoid-like supplements may increase the risk of severe headache, vision changes, pulsatile tinnitus, nausea, or double vision. The concern is greatest in acne treatment, adolescents, women of childbearing age, and anyone with prior intracranial hypertension.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Doxycycline and Vitamin A
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 4 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Doxycycline and high-dose vitamin A are both associated with intracranial hypertension, also called pseudotumor cerebri. Combining a tetracycline-class antibiotic with concentrated vitamin A or retinoid-like supplements may increase the risk of severe headache, vision changes, pulsatile tinnitus, nausea, or double vision. The concern is greatest in acne treatment, adolescents, women of childbearing age, and anyone with prior intracranial hypertension.
Mechanism. Tetracyclines can impair cerebrospinal fluid dynamics and have been repeatedly linked to drug-induced intracranial hypertension. Vitamin A excess and retinoids are also linked to intracranial hypertension, so the combination creates additive risk rather than a timing-sensitive absorption problem.
Recommendation. Avoid high-dose vitamin A supplements while taking doxycycline. Standard food intake and ordinary multivitamin doses are usually not the issue, but avoid retinol-heavy products unless your clinician approves them. Stop the supplement and seek urgent evaluation for severe headache, blurred vision, double vision, or ringing in the ears.
Sources (4)
- Friedman DI. Medication-induced intracranial hypertension in dermatology. Am J Clin Dermatol. 2005;6(1):29-37. PMID 15675888
- Quinn AG, Singer SB, Buncic JR. Pediatric tetracycline-induced pseudotumor cerbri. J AAPOS. 1999;3(1):53-57. PMID 10071902
- Jacobson DM, Berg R, Wall M, Digre KB, Corbett JJ, Ellefson RD. Serum vitamin A concentration is elevated in idiopathic intracranial hypertension. Neurology. 1999;53(5):1114-1118. PMID 10496276
- Walters BN, Gubbay SS. Tetracycline and benign intracranial hypertension: report of five cases. Br Med J (Clin Res Ed). 1981;282(6257):19-20. PMID 6449976
Stack Score
How this pair moves the number.
Effect on the composite score
If both Doxycycline and Vitamin A are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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