Indications
Octinoxate (also called octyl methoxycinnamate or ethylhexyl methoxycinnamate) is a sunscreen ingredient. It is used in sunscreens, day creams, lip balms and make-up to help protect the skin from sunburn caused by ultraviolet B (UVB) rays, and so to reduce sun damage and early skin ageing. It is usually combined with other filters for broad protection.
How It Works
Octinoxate is a chemical UV filter. It absorbs UVB rays from sunlight before they reach the living layers of the skin and releases the energy as a small amount of heat. It gives little protection against UVA rays, so it is combined with UVA filters such as Avobenzone, Zinc Oxide or Titanium Dioxide in broad-spectrum products.
Dosage and Administration
For external use only. Apply generously and evenly to exposed skin about 15 to 30 minutes before going into the sun, and reapply at least every 2 hours and after swimming, sweating or towel drying, or as directed on the label. Sunscreen products usually contain up to 7.5% Octinoxate (up to 10% in some countries).
Interactions
- No important interactions with medicines are known.
- Medicines that make the skin more sensitive to light (such as Doxycycline, some diuretics or Isotretinoin) increase the need for good sun protection.
Contraindications
- Known allergy to Octinoxate, cinnamates or any ingredient of the product.
- Not for use on broken or irritated skin.
Side Effects
Most people tolerate it well. Some may develop skin irritation, redness, itching or an allergic or light-triggered rash. Eye stinging can occur if it runs into the eyes.
Get urgent medical help if there is a severe rash, blistering, swelling of the face or difficulty breathing after use.
Pregnancy and Lactation
Small amounts can be absorbed through the skin. Normal use of sunscreen is generally considered acceptable in pregnancy and breastfeeding; some people prefer mineral sunscreens (Zinc Oxide or Titanium Dioxide) during this time. Do not apply to the nipple area before feeding.
Precautions and Warnings
- Sunscreen is one part of sun protection; also use shade, hats and clothing, and avoid strong midday sun.
- Not recommended for babies under 6 months; keep them out of direct sun.
- Avoid contact with the eyes; rinse with water if this happens.
- Some places restrict Octinoxate because of possible harm to coral reefs; check local rules when swimming in the sea.
Overdose
Overuse on the skin is unlikely to cause harm beyond irritation. If swallowed in a large amount, it may cause stomach upset; seek medical advice.
Therapeutic Class
Sunscreen agent (UVB filter).
Storage
Store below 30°C, away from direct sunlight and heat, with the cap closed. Keep out of the reach of children.
Prepared by the Oshud Alo team from standard drug references. For information only; always follow your doctor's advice.