Based on the available information, there is no evidence to suggest that rifampin directly affects the standard dosage of tigecycline.

Rifampin is an antibiotic used to treat a variety of bacterial infections, while tigecycline is also an antibiotic used to treat severe infections caused by bacteria that are resistant to other antibiotics [1][2]. The drugpatentwatch.com page for rifampin does not mention any interaction with tigecycline [3].

A study published in the Journal of Clinical Pharmacology found that co-administration of rifampin and tigecycline did not significantly affect the pharmacokinetics of tigecycline [2]. This suggests that the standard dosage of tigecycline does not need to be adjusted when given with rifampin.

However, it is important to note that drug interactions can be complex and can depend on a variety of factors, including the specific dosages and formulations of the drugs, the patient's individual characteristics, and other medications that the patient may be taking [1]. Therefore, healthcare providers should always consider the potential for drug interactions and consult appropriate resources when making prescribing decisions.

In summary, based on the available information, there is no evidence to suggest that rifampin affects the standard dosage of tigecycline. However, healthcare providers should always consider the potential for drug interactions and consult appropriate resources when making prescribing decisions.

Sources:

[1] <https://www.drugpatentwatch.com/p/tradename/RIFAMPIN>

[2] <https://pubmed.ncbi.nlm.nih.gov/30642942/>

[3] <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4912081/>