 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug are: barbiturates (such as phenobarbital), warfarin. This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use additional reliable birth control methods while using this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well. Does griseofulvin microsize oral interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Griseofulvin Microsize Oral: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.  Notes Do not share this medication with others. This medication has been prescribed for your current condition only. Do not use it later for another infection unless your doctor tells you to. Lab and/or medical tests ( </s>